Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Stock-Based Compensation Expense Allocation

Total stock-based compensation expense was recorded to cost of revenues and operating expenses based upon the functional responsibilities of the individuals holding the respective options as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Cost of revenues	$	22	$	13	$	41	$	13
Sales and marketing		10		13		18		16
Research and development		233		—		608		—
General and administrative		107		156		237		317
Total	$	372	$	182	$	904	$	346

Assumptions Used to Weighted-Average Grant Date Fair Values of Options Granted

The weighted-average grant date fair values of the options granted during the six months ended June 30, 2015 and 2014 were $3.62 and $4.51, respectively for employees and $4.44 and $0 for non-employees, using the following assumptions:

	Six Months Ended March 31,
	2015	2014
Risk free interest rate	0.87% - 1.47%*		1.64	%
Expected term	4.56 - 7 years*		4.75 years
Dividend yield	—		—
Expected volatility	76.76% - 82.88%*		81.36	%

* Represents the fair value assumptions for the non-employee options.