Note 12 - Long-term Incentive Plan - Stock Option Activity (Details)	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Outstanding outstanding (in shares) | shares	54,000
Weighted average exercise price, options outstanding (in dollars per share)	$ 1.83
Weighted average fair value at grant date, options outstanding (in dollars per share)	$ 0.43
Options exercised (in shares) | shares	0
Weighted average exercise price, options exercised (in dollars per share)	$ 0
Weighted average fair value at grant date, options exercised (in dollars per share)	$ 0
Options expired (in shares) | shares	0
Weighted average exercise price, options expired (in dollars per share)	$ 0
Weighted average fair value at grant date, options expired (in dollars per share)	$ 0
Outstanding outstanding (in shares) | shares	54,000
Weighted average exercise price, options outstanding (in dollars per share)	$ 1.83
Weighted average fair value at grant date, options outstanding (in dollars per share)	$ 0.43
Options Vested (in shares) | shares	54,000
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