Note 8 - Stock-based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2025 USD ($) $ / shares shares
Balance, number of options outstanding (in shares) | shares	176,000
Balance, option, weighted average exercise price (in dollars per share) | $ / shares	$ 1.94
Granted, options (in shares) | shares	0
Granted, option, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Exercised, options (in shares) | shares	0
Exercised, option, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Expired or forfeited, options (in shares) | shares	(105,000)
Expired or forfeited, option, weighted average exercise price (in dollars per share) | $ / shares	$ 2.44
Balance, number of options outstanding (in shares) | shares	71,000
Balance, option, weighted average exercise price (in dollars per share) | $ / shares	$ 1.2
Outstanding, weighted average remaining contractual term (Year)	10 months 2 days
Outstanding, aggregate intrinsic value | $	$ 2
Exercisable, options (in shares) | shares	71,000
Exercisable, option, weighted average exercise price (in dollars per share) | $ / shares	$ 1.2
Exercisable, weighted average remaining contractual term (Year)	10 months 2 days
Exercisable, aggregate intrinsic value | $	$ 2