Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

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

	Three Months Ended March 31,
	2014		2013

Cost of revenue	$	5	$	6
Selling, general and administrative		244		284
Research and development		43		42
Total stock-based compensation		292		332
Tax effect on stock-based compensation		—		—
Net effect on net income (loss)	$	292	$	332

The following table summarizes our stock option activities during the three months ended March 31, 2014 (in thousands, except per share data):

Stock Options	Shares			Weighted- average Exercise Price		Weighted- average Remaining Contractual Life (in years)		Aggregate Intrinsic Value

Balance as of January 1, 2014		2,671		$	3.29		6.71	$	893

Granted		—			—

Exercised		—			—

Canceled and expired		(74	)		5.18

Balance as of March 31, 2014		2,597		$	3.24		6.65	$	438

Options vested and expected to vest as of March 31, 2014		2,597		$	3.24		6.65	$	438

Options exercisable as of March 31, 2014		1,663		$	3.30		5.43	$	438

A summary of activity related to restricted stock awards for the three months ended March 31, 2014 is presented below:

Stock Awards	Shares		Weighted-Average Grant Date Fair Value
Non-vested as of January 1, 2014		241,232	$	3.44
Granted		—	$	—
Vested		—	$	—
Non-vested as of March 31, 2014		241,232	$	3.44