Note 3 - Related Party Transactions (Details Textual)										1 Months Ended						3 Months Ended	9 Months Ended	12 Months Ended
Note 3 - Related Party Transactions (Details Textual)	Dec. 21, 2018 USD ($)	Jul. 19, 2018 USD ($) $ / shares shares	Jul. 02, 2018 USD ($) $ / shares shares	Jun. 29, 2018 USD ($) $ / shares shares	May 02, 2018 USD ($) $ / shares shares	Mar. 12, 2018 USD ($) $ / shares shares	Mar. 08, 2018 USD ($)	Jan. 17, 2018 USD ($)	Dec. 14, 2017 USD ($)	Oct. 31, 2017 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares shares	Aug. 31, 2017 USD ($) $ / shares shares	Jul. 31, 2016 $ / shares	Jul. 31, 2015 USD ($) $ / shares shares	Mar. 31, 2015 USD ($)	Mar. 31, 2018 USD ($) $ / shares shares	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($) $ / shares	Dec. 31, 2015 USD ($)	Dec. 11, 2018 USD ($) shares	May 31, 2018 USD ($) $ / shares shares	Mar. 09, 2018 $ / shares shares	Jan. 31, 2018 USD ($) $ / shares shares	Jan. 18, 2018 $ / shares shares	Dec. 31, 2016 $ / shares
Proceeds from Related Party Debt																		$ 2,900,001	$ 1,100,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares										50,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares																		$ 1.86	$ 1.86							$ 1.53
Debt Instrument, Unamortized Discount, Total																		$ 666,638
Amortization of Debt Discount (Premium)																		360,657	$ 15,468
Debt Instrument, Face Amount																		2,100,000
Accretion Expense																		360,657	15,468
Prepaid Royalties, Related Party, Noncurrent																			319,441
General and Administrative Expense, Total																		4,562,912	7,402,271
Accounts Payable, Related Parties, Current																		127,480	77,597
First Note [Member]
Debt Instrument, Unamortized Discount, Total																					$ 11,000
Debt Instrument, Face Amount																					136,000
Unsecured Promissory Note [Member]
Debt Instrument, Interest Rate, Stated Percentage									10.00%
Debt Instrument, Unamortized Discount, Total																			18,652
Debt Instrument, Face Amount									$ 200,000
Unsecured Promissory Note [Member] \| Other Expense [Member]
Amortization of Debt Discount (Premium)																		9,326	434
Warrants Issued with Convertible Promissory Note [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares			$ 3
Debt Instrument, Convertible, Conversion Price \| $ / shares			$ 2
First Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares																								5,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares																								$ 3	$ 3
Warrants and Rights Outstanding																					$ 72,175
Warrants and Rights Outstanding, Term																								5 years	5 years
First Warrant [Member] \| Maximum [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares																					100,000
Director [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares											50,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares											$ 3
Warrants and Rights Outstanding, Term											5 years
Director [Member] \| Unsecured Promissory Note [Member]
Proceeds from Related Party Debt				$ 1,000,000
Director [Member] \| Unsecured Promissory Note [Member] \| Third Note [Member]
Proceeds from Related Party Debt							$ 200,000
Debt Instrument, Interest Rate, Stated Percentage							10.00%
Debt Instrument, Unamortized Discount, Total							$ 14,281									$ 14,281
Lender Fees																	$ 6,000
Debt Instrument, Face Amount																$ 200,000
Director [Member] \| Unsecured Promissory Note [Member] \| Fifth Note [Member]
Proceeds from Related Party Debt					$ 300,001
Debt Instrument, Interest Rate, Stated Percentage					10.00%
Debt Instrument, Unamortized Discount, Total					$ 21,452																	$ 21,452
Lender Fees					$ 9,000
Amortization of Debt Discount (Premium)																		9,409	0
Debt Instrument, Face Amount																						$ 300,001
Director [Member] \| Unsecured Promissory Note [Member] \| Fifth Note [Member] \| Maximum [Member]
Debt Instrument, Convertible, Conversion Price \| $ / shares					$ 3
Director [Member] \| Unsecured Promissory Note [Member] \| Other Expense [Member] \| Third Note [Member]
Amortization of Debt Discount (Premium)																		8,251	0
Director [Member] \| Unsecured Convertible Promissory Note [Member]
Debt Instrument, Interest Rate, Stated Percentage				10.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares				1,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares				$ 1
Debt Instrument, Unamortized Discount, Total				$ 414,416
Warrants and Rights Outstanding, Term				2 years
Lender Fees																	$ 30,000
Amortization of Debt Discount (Premium)																		112,626	0
Director [Member] \| Convertible Related Party Note Issued On July 2, 2018 [Member]
Proceeds from Related Party Debt			$ 250,000
Debt Instrument, Interest Rate, Stated Percentage			10.00%
Debt Instrument, Unamortized Discount, Total			$ 103,613
Lender Fees			$ 7,500
Amortization of Debt Discount (Premium)																		27,702	0
Director [Member] \| Convertible Related Party Note Issued On July 19, 2018 [Member]
Proceeds from Related Party Debt		$ 250,000
Debt Instrument, Interest Rate, Stated Percentage		10.00%
Debt Instrument, Unamortized Discount, Total		$ 103,609
Debt Instrument, Convertible, Conversion Price \| $ / shares		$ 3
Lender Fees		$ 7,500
Director [Member] \| Convertible Related Party Note Issued On July 19, 2018 [Member] \| Convertible Related Party Note Issued On July 19, 2018 [Member]
Amortization of Debt Discount (Premium)																		24,959	0
Director [Member] \| Unsecured Convertible Related Party Note Issued On December 21, 2018 [Member]
Proceeds from Related Party Debt	$ 100,000
Debt Instrument, Interest Rate, Stated Percentage	10.00%
Director [Member] \| Promissory Note [Member]
Proceeds from Related Party Debt											$ 500,000
Debt Instrument, Interest Rate, Stated Percentage											10.00%
Debt Instrument, Unamortized Discount, Total											$ 52,166
Accretion Expense																			8,718
Director [Member] \| Promissory Note [Member] \| Other Expense [Member]
Amortization of Debt Discount (Premium)																		26,084	8,718
Director [Member] \| Warrants Issued with Debt [Member] \| Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input														0
Director [Member] \| Warrants Issued with Debt [Member] \| Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input														1.842
Director [Member] \| Warrants Issued with Debt [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input														0.0166
Director [Member] \| Warrants Issued with Debt [Member] \| Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input														5
Director [Member] \| Warrants Issued with Convertible Promissory Note [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares		250,000	250,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares		$ 1	$ 1
Warrants and Rights Outstanding, Term		2 years	2 years
Director [Member] \| Third Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares																20,000							20,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares																$ 3							$ 3
Warrants and Rights Outstanding, Term																5 years							5 years
Director [Member] \| Fifth Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares					30,000																	30,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares					$ 3																	$ 3
Warrants and Rights Outstanding, Term					5 years																	5 years
Director [Member] \| Notes Payable [Member]
Proceeds from Related Party Debt														$ 500,000
Debt Instrument, Interest Rate, Stated Percentage														8.50%
Debt Instrument, Unamortized Discount, Total														$ 227,258
Debt Instrument, Convertible, Conversion Price \| $ / shares													$ 1.25
Debt Instrument, Convertible, Number of Equity Instruments													400,000
Interest Expense, Related Party																		42,500	12,500
Director [Member] \| Notes Payable [Member] \| Warrants Issued with Debt [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares														350,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares														$ 3
Warrants and Rights Outstanding														$ 416,618
Director [Member] \| Consulting Agreement [Member]
Related Party Transaction, Amounts of Transaction															$ 200,000
General and Administrative Expense, Total																				$ 200,000
Accounts Payable, Related Parties, Current																		65,000	75,000
Employee [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares												10,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares												$ 3
Warrants and Rights Outstanding, Term												5 years
Employee [Member] \| Promissory Note [Member]
Proceeds from Related Party Debt												$ 100,000
Debt Instrument, Interest Rate, Stated Percentage												10.00%
Debt Instrument, Unamortized Discount, Total												$ 10,435
Accretion Expense																			1,844
Employee [Member] \| Promissory Note [Member] \| Other Expense [Member]
Amortization of Debt Discount (Premium)																		5,218	1,844
Rio Vista [Member] \| Unsecured Promissory Note [Member]
Proceeds from Related Party Debt										$ 500,000
Debt Instrument, Interest Rate, Stated Percentage										10.00%
Debt Instrument, Unamortized Discount, Total										$ 50,229														$ 35,590
Debt Instrument, Face Amount																								$ 500,000
Accretion Expense																			4,472
Rio Vista [Member] \| Unsecured Promissory Note [Member] \| Other Expense [Member]
Amortization of Debt Discount (Premium)																		25,115	4,472
Rio Vista [Member] \| Warrants Issued to Rio Vista [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares										50,000														50,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares										$ 3														$ 3
Warrants and Rights Outstanding, Term										5 years														5 years
Corporate Counsel [Member] \| Unsecured Promissory Note [Member] \| First Note [Member]
Debt Instrument, Interest Rate, Stated Percentage																								10.00%
Debt Instrument, Unamortized Discount, Total																								$ 3,831
Debt Instrument, Face Amount																								$ 100,000
Corporate Counsel [Member] \| Unsecured Promissory Note [Member] \| Other Expense [Member] \| First Note [Member]
Amortization of Debt Discount (Premium)																$ 3,831
Investor [Member] \| Unsecured Promissory Note [Member]
Proceeds from Related Party Debt									200,000
Debt Instrument, Unamortized Discount, Total									$ 18,652
Accretion Expense																			434
Investor [Member] \| Unsecured Promissory Note [Member] \| First Note [Member]
Proceeds from Related Party Debt								$ 500,000
Debt Instrument, Interest Rate, Stated Percentage								10.00%
Debt Instrument, Face Amount								$ 500,000
Investor [Member] \| Unsecured Promissory Note [Member] \| Second Note [Member]
Debt Instrument, Interest Rate, Stated Percentage																									10.00%
Debt Instrument, Unamortized Discount, Total								35,590
Lender Fees								$ 15,000
Investor [Member] \| Unsecured Promissory Note [Member] \| Other Expense [Member] \| Second Note [Member]
Amortization of Debt Discount (Premium)																		27,283	0
Investor [Member] \| First Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares																									50,000
BPI [Member] \| Unsecured Promissory Note [Member] \| Third Note [Member]
Proceeds from Related Party Debt						$ 200,000
BPI [Member] \| Unsecured Promissory Note [Member] \| Fourth Note [Member]
Debt Instrument, Interest Rate, Stated Percentage						10.00%
Debt Instrument, Unamortized Discount, Total						$ 14,279										14,279
Debt Instrument, Convertible, Conversion Price \| $ / shares						$ 3
Lender Fees						$ 6,000
Debt Instrument, Face Amount																$ 200,000
Accretion Expense																		$ 20,279	0
BPI [Member] \| Fourth Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares						20,000										20,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares						$ 3										$ 3
Warrants and Rights Outstanding, Term						5 years										5 years
Key Employee and Principal Stockholder and Current Director [Member] \| Royalty Agreement [Member]
Deferred Compensation Arrangement with Individual, Maximum Contractual Term																		25 years
Payment of Royalties Equal to Percent of Gross Sales																		5.00%
Minimum Monthly Payment Amount to Offset Future Royalty Obligations																		$ 2,500
Revenue from Related Parties																		33,070	65,733
Prepaid Royalties, Related Party, Noncurrent																		0	$ 319,441
Royalties, Allowance for Collectability																		114,580
Royalty Expense																		1,654
Key Employee and Principal Stockholder and Current Director [Member] \| Royalty Agreement Patent Defense [Member]
Legal Fees																		$ 203,208

Zero Gravity Solutions, Inc. 10-K