Note 13 - Equity - Changes in Stockholders' Equity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Balances	$ 215,804,763	$ 196,858,907
Net (loss)/income	(408,223)	10,277,340
Payment of common stock tendered for employee stock-based compensation tax obligations	(166,193)
Issuance of common stock upon vesting of RSUs	0
Stock-based compensation	902,280	1,130,010
Issuance of common stock		(158,980)
Cash dividend ($0.60 per share)		(43,117,072)
Balances	$ 216,132,627	$ 164,990,205
Common Stock [Member]
Balances (in shares)	71,404,669	71,091,616
Balances	$ 7,140	$ 7,109
Net (loss)/income	$ 0	0
Payment of common stock tendered for employee stock-based compensation tax obligations (in shares)	(26,408)
Payment of common stock tendered for employee stock-based compensation tax obligations	$ (2)
Issuance of common stock upon vesting of RSUs (in shares)	62,822
Issuance of common stock upon vesting of RSUs	$ 6
Stock-based compensation	$ 0	$ 0
Issuance of common stock (in shares)		30,900
Issuance of common stock		$ 3
Cash dividend ($0.60 per share)		$ 0
Balances (in shares)	71,441,083	71,122,516
Balances	$ 7,144	$ 7,112
Additional Paid-in Capital [Member]
Balances	238,635,635	235,795,420
Net (loss)/income	0	0
Payment of common stock tendered for employee stock-based compensation tax obligations	(166,191)
Issuance of common stock upon vesting of RSUs	(6)
Stock-based compensation	902,280	1,130,010
Issuance of common stock		158,983
Cash dividend ($0.60 per share)		0
Balances	239,371,718	236,766,447
Retained Earnings [Member]
Balances	(22,838,012)	(38,943,622)
Net (loss)/income	(408,223)	10,277,340
Payment of common stock tendered for employee stock-based compensation tax obligations	0
Issuance of common stock upon vesting of RSUs	0
Stock-based compensation	0	0
Issuance of common stock		0
Cash dividend ($0.60 per share)		(43,117,072)
Balances	(23,246,235)	(71,783,354)
AOCI Attributable to Parent [Member]
Balances	0	0
Net (loss)/income	0	0
Payment of common stock tendered for employee stock-based compensation tax obligations	0
Issuance of common stock upon vesting of RSUs	0
Stock-based compensation	0	0
Issuance of common stock		0
Cash dividend ($0.60 per share)		0
Balances	$ 0	$ 0

SIGA TECHNOLOGIES INC 10-Q