Note 9 - Provisions (Details Textual) - USD ($)									3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
Note 9 - Provisions (Details Textual) - USD ($)	Dec. 11, 2023	Oct. 10, 2023	Aug. 23, 2023	Mar. 22, 2023	Oct. 21, 2022	Jul. 07, 2022	Mar. 23, 2022	Aug. 10, 2020	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2023	Mar. 31, 2019	Mar. 21, 2019
Stock Issued During Period, Value, Litigation Settlement									$ 2,750,000
Other Legal Fees Obligations [Member]
Loss Contingency Accrual									2,514,862			$ 2,514,862		$ 1,384,532
Claims Made Regarding Certain Royalty Payments by Former CEO[Member]
Percentage of Royalties Payable															1.00%	1.00%
Loss Contingency Accrual									1,137,882			1,137,882		963,808
Loss Contingency Accrual, Period Increase (Decrease)									76,072			174,074
Loss Contingency Accrual, Payments										$ 64,415		0	$ 281,244
Loss Contingency Accrual, Foreign Currency Translation Adjustment										$ 9,317			$ 37,707
Claim and Demand For Arbitration Against Peter M. Galloway and PMGSL Holdings, LLC [Member]
Loss Contingency Accrual									4,157,014			4,157,014		600,000
Litigation Settlement, Amount Awarded to Other Party			$ 4,000,000			$ 68,000
Litigation Settlement, Amount Awarded to Other Party, Before Fees			$ 2,200,000
Litigation Settlement, Amount Awarded to Other Party, Interest Rate			10.50%
Lawsuit Against 9354-7537 Quebec Inc. for Alleged Breach of Supply Agreement [Member]
Loss Contingency Accrual									0			0
Loss Contingency Accrual, Foreign Currency Translation Adjustment														(63,381)
Litigation Settlement, Amount Awarded to Other Party							$ 1,127,024				$ 543,774
Gain (Loss) Related to Litigation Settlement											$ 583,430
Payments for Legal Settlements														515,464
Marvin Gong v. Neptune Wellness Solutions, et al. [Member]
Loss Contingency Accrual									$ 0			0
Payments for Legal Settlements		$ 1,500,000
Loss Contingency, Damages Paid, Value				$ 500,000
Loss Contingency, Damages Paid, Value, Per Installment				$ 500,000
Stock Issued During Period, Shares, Litigation Settlement (in shares)		2,522,936
Stock Issued During Period, Value, Litigation Settlement		$ 2,750,000
Marvin Gong v. Neptune Wellness Solutions, et al. [Member] \| Minimum [Member]
Litigation Settlement, Amount Awarded to Other Party					$ 4,000,000
Marvin Gong v. Neptune Wellness Solutions, et al. [Member] \| Maximum [Member]
Litigation Settlement, Amount Awarded to Other Party					$ 4,250,000
Carolina Rework Solutions, LLC v, Neptune Health & Wellness Innovation, Inc. [Member]
Loss Contingency, Damages Sought, Value								$ 2,000,000				2,000,000		315,909
Baxter Food Group Limited Litigation [Member]
Loss Contingency, Damages Sought, Value	$ 5,000,000											$ 5,000,000		$ 0

Neptune Wellness Solutions Inc. 10-Q