Note 12 - Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

				Weighted Average
	Options on					Remaining		Aggregate
	Common			Exercise		Contractual		Intrinsic
	Shares			Price		Term		Value
Outstanding January 1, 2022		3,935,883		$	5.24		4.79
Granted		4,153,885		$	3.64
Exercised		(55,500	)	$	1.50
Forfeited, cancelled, expired		(2,542,869	)	$	5.79
Outstanding December 31, 2022		5,491,399		$	3.72		5.96	$	92
Exercisable December 31, 2022		2,465,110		$	4.55		2.13	$	92

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	For the Year Ended
	December 31,
	2022			2021
Expected stock price volatility		49	%		50	%
Risk-free interest rate		2.47	%		0.90	%
Forfeiture rate		0	%		0	%
Expected dividend yield		0	%		0	%
Expected life of options - years		5.96			5.74
Weighted-average fair value of options granted	$	0.88		$	2.57

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

				Weighted
				Average		Weighted				Weighted
				Remaining		Average				Average
Range of		Number		Contractual		Exercise		Number		Exercise
Exercise Prices		Outstanding		Life (Years)		Price		Exercisable		Price
$	1.50 –2.27		820,750		0.39	$	1.62		481,750	$	1.50
$	2.55 –3.83		876,409		0.87	$	2.92		35,000	$	3.61
$	3.85 –5.78		2,050,010		2.19	$	5.24		1,869,613	$	5.28
$	5.88 –8.82		130,000		6.25	$	6.42		78,747	$	6.36

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

				Weighted Average		Weighted Average
	Service-Based			Grant Date		Vesting
	RSU's			Fair Value		Period (Years)
Unvested at January 1, 2021		428,006		$	6.13		2.3
Granted - service based		398,662		$	5.59
Vested		(524,491	)	$	5.55
Forfeited and cancelled		(32,874	)	$	6.10
Unvested at December 31, 2021		269,303		$	6.47		2.0
Granted - service based		988,850		$	2.49
Vested		(268,548	)	$	4.13
Forfeited and cancelled		(67,273	)	$	6.45
Unvested at December 31, 2022		922,057		$	2.88		2.11

Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]

	For the Year Ended
	December 31,
	2022		2021
Selling, general and administrative	$	2,684	$	4,558
Research and development		541		798
Total share-based expense	$	3,225	$	5,356