Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2017

Estimated Fair Values of Liabilities Measured on Recurring Basis

The estimated fair values of the liabilities measured on a recurring basis are as follows:

	Fair Value Measurements at March 31, 2017 and 2016 (in thousands):
	Balance at March 31, 2017		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)
Warrant liability	$	—	$	—	$	—	$	—

	Balance at March 31, 2016		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Other Unobservable Inputs (Level 3)
Warrant liability	$	4	$	—	$	—	$	4

Activity for Liabilities Measured at Estimated Fair Value Using Unobservable Inputs

The following table presents the activity for liabilities measured at estimated fair value using unobservable inputs for the years ended March 31, 2017 and 2016:

Fair Value Measurements Using Significant Unobservable Inputs (Level 3)

	Warrant Derivative Liability (in thousands)
Balance at March 31, 2015	$	126
Issuances	$	—
Adjustments to estimated fair value	$	17
Warrant liability removal due to settlements	$	(139	)
Balance at March 31, 2016	$	4
Issuances	$	—
Adjustments to estimated fair value	$	(4	)
Warrant liability removal due to settlements	$	—
Balance at March 31, 2017	$	—