Note 11 - Long-term Incentive Plan - Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Outstanding (in shares) | 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) | shares	0
Weighted average exercise price, Options granted (in dollars per share)	$ 0
Options exercised (in shares) | shares	0
Weighted average exercise price, Options exercised (in dollars per share)	$ 0
Options exercised (in dollars per share)	$ 0
Options expired (in shares) | 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) | shares	(54,000)
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) | shares	0
Weighted average exercise price, Outstanding (in dollars per share)	$ 0
Weighted average fair value at grant date, Outstanding (in dollars per share)	$ 0