Note 18 - Other Stockholders' Equity - Reserved Shares (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Shares reserved (in shares)	10,710,572	7,377,160
Shares reserved (in shares)	(10,710,572)	(7,377,160)
Warrants exercised (in shares)	195,160	597,500
Series A Preferred Stock [Member]
Shares reserved (in shares)		5,482,000
Shares reserved (in shares)		(5,482,000)
Series B Preferred Stock [Member]
Shares reserved (in shares)		1,700,000
Shares reserved (in shares)		(1,700,000)
Series C Preferred Stock [Member]
Shares reserved (in shares)	1,700,000
Shares reserved (in shares)	(1,700,000)
Series D Preferred Stock [Member]
Shares reserved (in shares)	1,700,000
Shares reserved (in shares)	(1,700,000)
Series D Preferred Stock Warrants [Member]
Warrants exercised (in shares)	128,572
Series A Preferred Stock Warrants [Member]
Shares reserved (in shares)		195,160
Shares reserved (in shares)		(195,160)
Warrants exercised (in shares)		597,500
Warrants 2020 [Member]
Shares reserved (in shares)	195,160
Shares reserved (in shares)	(195,160)