Note 9 - Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

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

				Weighted Average
	Options on Common Shares			Exercise Price		Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding January 1, 2023		5,491,399		$	3.72		5.96	$	92
Granted		60,000		$	1.34
Exercised		(250	)	$	1.5
Forfeited, cancelled, expired		(1,982,900	)	$	4.14
Outstanding June 30, 2023		3,568,249		$	3.37		8.08	$	7
Exercisable June 30, 2023		1,052,714		$	4.56		6.79	$	0

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

	For the Six Months
	Ended June 30,
	2023			2022
Expected stock price volatility		49	%		49	%
Risk-free interest rate		3.64	%		1.09	%
Expected life of options		6.66			1.82
Weighted-average fair value of options granted	$	0.55		$	1.32

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

	Service-Based RSU's			Weighted Average Grant Date Fair Value		Weighted Average Vesting Period (Years)
Unvested at January 1, 2023		922,057		$	2.88		2.11
Granted - service based		625,896		$	1.31
Vested		(734,444	)	$	2.87
Forfeited and cancelled		(264,172	)	$	2.49
Unvested at June 30, 2023		549,337		$	2.03		1.88

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Selling, general and administrative	$	990	$	591	$	1,552	$	1,485
Research and development		231		136		297		271
Total share-based expense	$	1,221	$	727	$	1,849	$	1,756