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Stockholders' Equity (Tables)

12 Months Ended

Mar. 31, 2018

Components of Employee Stock-Based Compensation

The components of employee stock-based compensation for the years ended March 31, 2018, 2017 and 2016 were as follows (in thousands):



	Fiscal years ended March 31,
	2018		2017		2016
Stock options	$	227	$	323	$	663
Restricted stock and stock awards	2,434		2,569		2,574
Employee stock purchase plan	31		—		11
Total stock-based compensation expense	$	2,692	$	2,892	$	3,248

Summary of Stock-Based Compensation Expense

The following table summarizes employee stock-based compensation expense by financial statement line item for the fiscal years ended March 31, 2018, 2017 and 2016 (in thousands):



	Fiscal years ended March 31,
	2018		2017		2016
Cost of revenues	$	137	$	185	$	274
Research and development	373		214		418
Selling, general and administrative	2,182		2,493		2,556
Total	$	2,692	$	2,892	$	3,248

Summary of Employee and Non-Employee Stock Options Activity

The following table summarizes the information concerning currently outstanding and exercisable employee and non-employee options:



	Options / Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (thousands)
Outstanding at March 31, 2017	352,008		$	79.63
Granted	—		—
Exercised	—		—
Canceled/forfeited	(71,117	)	119.64
Outstanding at March 31, 2018	280,891		$	69.51	4.6	$	—
Exercisable at March 31, 2018	236,040		$	80.15	4.3	$	—
Fully vested and expected to vest at March 31, 2018	279,465		$	69.79	4.6	$	—

Schedule of Weighted Average Assumptions used in Black-Scholes Valuation Model for Stock Options Granted

The weighted average assumptions used in the Black-Scholes valuation model for stock options granted during the fiscal years ended March 31, 2018, 2017, and 2016 are as follows:



	Fiscal years ended March 31,
	2018	2017		2016
Expected volatility	N/A	67.6	%	N/A
Risk-free interest rate	N/A	1.3	%	N/A
Expected life (years)	N/A	5.7		N/A
Dividend yield	N/A	—	%	N/A

Summary of the Employee and Non-Employee Restricted Stock Activity

The following table summarizes the employee and non-employee restricted stock activity for the year ended March 31, 2018:



	Shares		Weighted Average Grant Date Fair Value		Intrinsic Aggregate Value (thousands)
Outstanding at March 31, 2017	424,925		$	9.47
Granted	854,307		3.91
Vested	(344,147	)	8.28
Forfeited	(38,599	)	8.99
Outstanding at March 31, 2018	896,486		$	4.65	$	5,218