Note 7 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

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

	Year ended December 31,
	2020		2019
Stock options	$	838	$	623
Restricted stock		105		130
Total	$	943	$	753

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

	Year ended December 31,
	2020			2019
Risk-free interest rate		0.4	%		1.8	%
Volatility factor		49	%		48	%
Weighted average expected life (years)		5.3			5.3
Forfeiture rate		10.0	%		10.0	%
Dividends		0.0	%		0.0	%

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

Year ended December 31, 2020
	Number of shares			Weighted average exercise price per share		Weighted average remaining contractual term		Aggregate intrinsic value
Shares under option – January 1		1,541,792		$	6.88
Options granted		256,000			6.51
Options exercised		(355,797	)		6.08
Options forfeited or expired		(224,332	)		9.76
Shares under option – December 31		1,217,163		$	6.50		3.97	$	1,034
Vested and expected to vest - December 31		1,115,705		$	6.39		3.81	$	1,034
Options exercisable – December 31		738,452		$	5.82		2.79	$	1,034

Year ended December 31, 2019
	Number of shares			Weighted average exercise price per share
Shares under option – January 1		1,576,087		$	6.58
Options granted		282,500			8.27
Options exercised		(208,881	)		4.45
Options forfeited or expired		(107,914	)		10.93
Shares under option – December 31		1,541,792		$	6.88
Options exercisable – December 31		1,083,581		$	6.28

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

			Option outstanding						Options exercisable
Range of exercise prices			Number of outstanding options		Weighted- average remaining contractual life		Weighted- average exercise price		Number of options exercisable		Weighted- average exercise price
$3.71	-	$3.94		204,244		0.81	$	3.80		204,244	$	3.80
$4.29	-	$5.71		317,667		2.78		4.93		317,667		4.93
$6.24	-	$7.16		267,333		6.13		6.54		13,667		6.87
$8.25	-	$9.96		427,919		5.01		8.92		202,874		9.19
$3.71	-	$9.96		1,217,163		3.97	$	6.50		738,452	$	5.82