Note 14 - Equity - Common Stock Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Shares outstanding (in shares)	180,089,613	113,346,472
Shares issued to secure financing facility (in shares)	1,000,000	2,500,000
Shares issued for cash (in shares)	1,000,000	15,700,000
Shares issued pursuant to option exchange and RSU vesting (in shares)	902,630	1,883,248
Shares issued pursuant to warrant exercises (in shares)	400
Recission of shares previously issued at holder request	$ (2,817)
Shares issued to secure financing facility (in shares)	1,000,000	2,500,000
Shares issued as compensation in lieu of cash (in shares)	921,218
Shares outstanding (in shares)	347,233,341	180,089,613
Conversion of Series A Preferred to Common Stock [Member]
Shares issued pursuant to conversion (in shares)	74,562,000	18,640,000
Shares issued pursuant to conversion (in shares)	74,562,000	18,640,000
Conversion of Series A-1 Preferred to Common Stock [Member]
Shares issued pursuant to conversion (in shares)	73,910,000	19,016,452
Shares issued pursuant to conversion (in shares)	73,910,000	19,016,452
Conversion of Series D Preferred Stock into Common Stock [Member]
Shares issued pursuant to conversion (in shares)	11,149,123
Shares issued pursuant to conversion (in shares)	11,149,123
Series A Preferred Stock Dividends [Member]
Shares issued pursuant to payment of stock dividend (in shares)	1,911,587	1,388,876
Shares issued as payment of stock dividend on Series C Preferred (in shares)	1,911,587	1,388,876
Series A-1 Preferred Stock Dividends [Member]
Shares issued pursuant to payment of stock dividend (in shares)	1,789,587	1,159,416
Shares issued as payment of stock dividend on Series C Preferred (in shares)	1,789,587	1,159,416
Series D Preferred Stock Dividends [Member]
Shares issued pursuant to payment of stock dividend (in shares)		6,455,149
Shares issued as payment of stock dividend on Series C Preferred (in shares)		6,455,149