Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2015		2014
Cost of revenues	$	19	$	—
Sales and marketing		8		3
Research and development		375		—
General and administrative		130		161
Total	$	532	$	164

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 three months ended March 31, 2015 and 2014 were $3.35 and $4.51, respectively for employees and $4.44 and $0 for non-employees, using the following assumptions:

	Three Months Ended March 31,
	2015	2014
Risk free interest rate	0.90% - 1.47%		1.64	%
Expected term	4.56 - 7 years		4.75 years
Dividend yield	—		—
Expected volatility	76.76% - 82.88%		81.36	%