Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Stock-Based Compensation

Summary of compensation costs related to stock-based awards

The following table summarizes compensation costs related to our stock-based awards (in thousands, except per share data):

	Three Months Ended
	March 31,
	2020		2019
Cost of revenue	$	28	$	31
Selling, general and administrative		492		437
Research and development		123		90
Total stock-based compensation		643		558
Tax effect on stock-based compensation		—		—
Net effect on net income (loss)	$	643	$	558

Summary of stock option activity

The following table summarizes the stock option transactions during the three months ended March 31, 2020 (in thousands, except per share data):

				Weighted
				average
		Weighted-		Remaining
	Number of	average		Contractual	Aggregate
	Options	Exercise		Life	Intrinsic
Stock Options	Outstanding	Price		(in years)	Value
Balance as of January 1, 2020	2,953	$	4.00	5.95	$	3,040
Granted	—		—	0		0
Exercised	(190)		2.32	0		0
Canceled and expired	—		—	0		0
Balance as of March 31, 2020	2,763	$	4.12	5.82	$	954
Options vested as of March 31, 2020 and unvested options expected to vest, net of forfeitures	2,728	$	4.12	5.78	$	950
Options exercisable as of March 31, 2020	2,031	$	4.01	4.72	$	890

Summary of restricted stock awards activity

A summary of activity related to restricted stock awards for the three months ended March 31, 2020 is presented below (in thousands, except per share data):

		Weighted-Average
		Grant Date
Stock Awards	Shares	Share Value
Non-vested as of January 1, 2020	939	$	5.02
Granted	10	$	4.00
Vested	(3)	$	4.32
Forfeited	(5)	$	5.98
Non-vested as of March 31, 2020	941	$	5.01