Note 13 - Stockholders' Equity - Warrants (Details) - shares		12 Months Ended
Aug. 17, 2021	Dec. 31, 2022	Dec. 31, 2021
Balance, Warrants (in shares)		1,015,000	515,000
Warrants issued in connection with public offering and private placement (in shares)		34,905,000	0
Common stock exchanged to prefunded warrant (in shares)	500,000	0	500,000
Balance, Warrants (in shares)		35,920,000	1,015,000

Number of warrants issued in exchanged of common stock during the period.

No definition available.

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Balance Type:	na
Period Type:	duration