Stock-Based Compensation (Tables)

6 Months Ended

Sep. 30, 2017

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

Summary of Stock-Based Compensation Expense

The Company accounts for its stock-based compensation at fair value. The following table summarizes stock-based compensation expense by financial statement line item for the three and six months ended September 30, 2017 and 2016 (in thousands):



	Three months ended September 30,				Six months ended September 30,
	2017		2016		2017		2016
Cost of revenues	$	23	$	49	$	59	$	99
Research and development	61		62		110		92
Selling, general and administrative	394		542		1,063		1,462
Total	$	478	$	653	$	1,232	$	1,653

Schedule of Weighted Average Assumptions for Stock Options

These options will vest over 2 years. The weighted average assumptions used in the Black Scholes valuation model for stock options granted during the six months ended September 30, 2016 are as follows:.



	September 30, 2017	September 30, 2016		September 30, 2017	September 30, 2016
Expected volatility	N/A	67.6	%	N/A	67.6	%
Risk-free interest rate	N/A	1.3	%	N/A	1.3	%
Expected life (years)	N/A	5.7		N/A	5.7
Dividend yield	N/A	None		N/A	None