Employee Benefit Plans and Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2015

Stock-Based Compensation [Abstract]

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				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Cost of revenue	$	5	$	4	$	15	$	14
Selling, general and administrative		260		227		902		716
Research and development		46		41		134		131
Total stock-based compensation		311		272		1,051		861
Tax effect on stock-based compensation		—		—		—		—
Net effect on net income (loss)	$	311	$	272	$	1,051	$	861

Weighted-average assumptions

The fair value of our stock options granted to employees for the three and nine months ended September 30, 2015 was estimated using the following weighted-average assumptions:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015		2015
Expected term (in years)	—		1.0
Volatility	—	%	54.21	%
Expected dividend	—	%	—	%
Risk-free interest rate	—	%	1.86	%

Summary of stock option activity

The following table summarizes the stock option transactions during the nine months ended September 30, 2015 (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, 2015	3,198	$	3.12	6.95	$	1,247
Granted	20		2.51
Exercised	(119)		1.38
Canceled and expired	(62)		3.86
Balance as of September 30, 2015	3,037	$	3.17	5.40	$	96
Options vested as of September 30, 2015 and unvested options expected to vest, net of forfeitures	3,037	$	3.17	5.40	$	96
Options exercisable as of September 30, 2015	2,033	$	3.50	4.38	$	96

Restricted stock awards

A summary of activity related to restricted stock awards for the nine months ended September 30, 2015 is presented below (in thousands, except per share data):

		Weighted-Average
		Grant Date
Stock Awards	Shares	Fair Value
Non-vested as of  January 1, 2015	261	$	2.71
Granted	336	$	2.56
Vested	(118)	$	2.65
Forfeited	(13)	$	2.34
Non-vested as of  September 30, 2015	466	$	2.63