Note 9 - Stock Options and Restricted Stock - Summary of Restricted Stock Options (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2022 $ / shares shares
Balance, Restricted shares (in shares) | shares	181,221
Balance, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.58
Granted, Restricted shares (in shares) | shares	345,000
Granted, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.68
Vested, Restricted shares (in shares) | shares	(178,721)
Vested, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.12
Forfeited, Restricted shares (in shares) | shares	(80,000)
Forfeited, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.21
Balance, Restricted shares (in shares) | shares	267,500
Balance, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.44