Note 6 - Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended March 31,
	2022		2021
Share-based compensation expense:
Sales and marketing	$	50	$	30
Technology support		5		11
General and administrative		460		458
Share-based compensation costs	$	515	$	499

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

	Three Months Ended March 31,
	2021		2020
Number of service-based options granted		500,000		765,000
Weighted average grant date fair value	$	2.09	$	1.82
Weighted average exercise price	$	2.94	$	2.60

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

	Three Months Ended March 31,
	2022			2021
Dividend yield		—			—
Volatility		94.8	%		94.4	%
Risk-free interest rate		1.6	%		0.7	%
Expected life (years)		4.8			4.8

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

	Three Months Ended March 31,
	2021		2020
Number of stock options exercised		—		54,705
Weighted average exercise price	$	—	$	2.30

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

	Number of Options			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
						(years)		(thousands)
Outstanding at December 31, 2021		4,381,348		$	3.85		4.3	$	1,662
Granted		500,000			2.94		—		—
Exercised		—			—		—		—
Forfeited or expired		(185,826	)		4.58		—		—
Outstanding at March 31, 2022		4,695,522		$	3.73		4.3	$	177
Vested and expected to vest at March 31, 2022		4,541,629		$	3.76		4.3	$	175
Exercisable at March 31, 2022		3,214,119		$	4.15		3.6	$	141