Note 7 - Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

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

	Nine Month Period Ended
	September 30, 2019
				Wtd. Avg.
				Exercise
	Options			Price
Outstanding at beginning of year		2,043,402		$	1.91
Granted		—		$	—
Exercised		(339,237	)	$	1.83
Forfeited		(3,437	)	$	5.69
Expired		—		$	—
Outstanding service vesting-based at September 30, 2019		1,700,728		$	1.92
Service vesting-based options exercisable at September 30, 2019		1,546,830		$	1.89

	Nine Month Period Ended
	September 30, 2019
				Wtd. Avg.
				Exercise
	Options			Price
Outstanding at beginning of year		964,997		$	1.64
Granted		—		$	—
Exercised		(135,000	)	$	1.64
Outstanding performance-based at September 30, 2019		829,997		$	1.64
Performance-based options exercisable at September 30, 2019		829,997		$	1.64

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Nine Month Period Ended
	September 30, 2019
Service vesting-based restricted stock	Number of Restricted Shares			Grant-Date Fair Value
Outstanding at beginning of year		279,919		$	5.00
Granted		224,218		$	17.68
Vested		(106,683	)	$	4.65
Forfeited		(26,354	)	$	11.60
Outstanding at September 30, 2019		371,100		$	12.29

	Nine Month Period Ended
	September 30, 2019
Performance-based restricted stock	Number of Restricted Shares		Grant-Date Fair Value
Outstanding at beginning of year		—	$	—
Expected to vest		123,851	$	17.79
Vested		—	$	—
Outstanding at September 30, 2019		123,851	$	17.79

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

	Three Month Period Ended				Nine Month Period Ended
	September 30,				September 30,
(In thousands)	2019		2018		2019		2018
Research and development costs	$	122	$	65	$	327	$	195
Sales and marketing costs		141		64		438		202
General and administrative costs		338		195		1,016		577
Cost of revenue		53		59		126		157
Total	$	654	$	383	$	1,907	$	1,131