v3.19.1

Consolidated Balance Sheets (Parentheticals) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Accounts receivable, reserves for uncollectable accounts	$ 154,114	$ 95,884
Debt discount, current	$ 0	$ 789,287
Preferred stock, par value (in dollars per share)	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	200,000,000	200,000,000
Common stock, issued (in shares)	394,409	394,409
Common stock, outstanding (in shares)	394,409	394,409
Series I Preferred Stock [Member]
Series I preferred stock, shares issued (in shares)	100	0
Series I preferred stock, shares outstanding (in shares)	100	0
Series G Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	538	538
Preferred stock, shares outstanding (in shares)	538	538
Preferred stock, liquidation value	$ 538,000	$ 538,000
Series H Convertible Preferred Stock [Member]
Preferred stock, shares issued (in shares)	501	501
Preferred stock, shares outstanding (in shares)	501	501
Preferred stock, liquidation value	$ 501,000	$ 501,000

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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TOWERSTREAM CORP 10-K