Note 15 - Stock-based Compensation - Stock Options Outstanding (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Options, Exercisable, Number of Shares (in shares) | shares	1,887,155
Options, Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares (in dollars per share) | $ / shares	$ 11.50
Options, Exercisable, Weighted Average Remaining Contractual Term (Year)	5 years 4 months 24 days
Options, Exercisable, Aggregate Intrinsic Value | $	$ 0.7
Options, Vested and Expected to Vest, Exercisable, Number of Shares (in shares) | shares	4,498,953
Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 6.75
Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term (Year)	5 years 7 months 24 days
Options, Vested or Expected to Vest, Aggregate Intrinsic Value | $	$ 1.4