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Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Mar. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Data

The following quarterly financial data, in the opinion of management, fairly presents the results for the periods presented (in thousands, except per share data):

		Year Ended March 31, 2017
		First Quarter				Second Quarter				Third Quarter				Fourth Quarter
Revenue		$	891			$	1,376			$	1,151			$	812
Net loss			(8,767	)			(9,442	)			(9,581	)			(10,657	)
Net loss per common share - basic and diluted			(0.09	)			(0.10	)			(0.09	)			(0.10	)
Weighted average shares used in computing net loss per common share—basic and diluted			92,391,964				93,185,400				101,174,734				104,385,617


		Year Ended March 31, 2016
		First Quarter				Second Quarter				Third Quarter				Fourth Quarter
Revenue		$	306			$	301			$	328			$	548
Net loss			(8,491	)			(11,257	)			(10,455	)			(8,372	)
Net loss per common share - basic and diluted			(0.10	)			(0.12	)			(0.11	)			(0.09	)
Weighted average shares used in computing net loss per common share—basic and diluted			82,993,966				92,385,150				92,396,358				92,402,668