Note 11 - Long-term Incentive Plan - Stock Option Activity (Details) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Outstanding (in shares)	54,000
Weighted average exercise price, Outstanding (in dollars per share)	$ 1.83
Weighted average fair value at grant date, Outstanding (in dollars per share)	$ 0.43
Options granted (in shares)	0
Weighted average exercise price, Options granted (in dollars per share)	$ 0
Options exercised (in shares)	0	0
Weighted average exercise price, Options exercised (in dollars per share)	$ 0
Options exercised (in dollars per share)	$ 0
Options expired (in shares)	0
Weighted average exercise price, Options expired (in dollars per share)	$ 0
Options expired (in dollars per share)	$ 0
Options cancelled or forfeited (in shares)	(36,000)
Weighted average exercise price, options cancelled or forfeited (in dollars per share)	$ 1.83
Weighted average fair value at grant date, Options cancelled or forfeited (in dollars per share)	$ 0.43
Outstanding (in shares)	18,000
Weighted average exercise price, Outstanding (in dollars per share)	$ 1.83
Weighted average fair value at grant date, Outstanding (in dollars per share)	$ 0.43
Options Vested (in shares)	18,000
Weighted average exercise price, Options Vested (in dollars per share)	$ 1.83
Weighted average fair value at grant date, Options Vested (in dollars per share)	$ 0.43
Exercisable at March 31, 2023 (in shares)	0