Note 10 - Stock Incentive Plan - MSU Activities (Details) - Market Based Stock Units [Member] - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Balance, other than options (in shares)	621,314	31,083
Balance, other than options, weighted average grant date fair value (in dollars per share)	$ 1.57	$ 43.53
Balance, other than options, weighted average vesting term (Year)		7 months 6 days	7 months 6 days
Balance, other than options, aggregate fair value		$ 977,558	$ 1,353,043
Granted, other than options (in shares)	0	600,000
Exercised/released, other than options (in shares)	(300,000)
Exercised/released, other than options, weighted average grant date fair value (in dollars per share)	$ 0.14
Cancelled/forfeited, other than options (in shares)	(321,314)	(9,769)
Cancelled/forfeited, other than options, weighted average grant date fair value (in dollars per share)	$ 2.91	$ 43.53
Balance, other than options (in shares)	0	621,314	31,083
Balance, other than options, weighted average grant date fair value (in dollars per share)	$ 0	$ 1.57	$ 43.53
Granted, other than options (in shares)	0	600,000
Granted, other than options, weighted average grant date fair value (in dollars per share)		$ 0.08
Cancelled/forfeited, other than options (in shares)	(321,314)	(9,769)