Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2016		Sep. 30, 2015
Adjustments to reconcile net loss to net cash provided by operating activities:
Net loss	$ (15,179)		$ (15,465)
Depreciation	3,140		3,671
Amortization of bond premium	400		0
Stock-based compensation expense	14,861		12,026
Gain on short-term investments and other, net	111		(1,587)
Tax effect on other comprehensive loss	(75)		0
Changes in operating assets and liabilities:
Accounts receivable	(4,287)		(217)
Inventories	2,968		3,149
Other assets	1,042		2,109
Accounts payable	384		(2,358)
Veloce accrued liability	(3,668)		(90)
Deferred revenue	(10)		(23)
Net cash provided by operating activities	664		1,385
Accrued payroll and other accrued liabilities	977		170
Investing activities:
Proceeds from sales and maturities of short-term investments	28,145		47,847
Purchases of short-term investments	(28,801)		(63,702)
Proceeds from sale of property and equipment	2		31
Purchases of property and equipment	(3,308)		(807)
Net cash used for investing activities	(3,962)		(16,631)
Financing activities:
Proceeds from issuance of common stock	1,776		1,245
Funding of restricted stock units withheld for taxes and other	(1,054)		(1,419)
Net cash provided by (used for) financing activities	722		(174)
Net decrease in cash and cash equivalents	(2,576)		(15,420)
Cash and cash equivalents at beginning of period	25,065	[1]	36,495
Cash and cash equivalents at end of period	22,489		21,075
Supplementary cash flow disclosures:
Cash paid for income taxes	369		328
Common stock issued for Veloce merger consideration	$ 0		$ 2,868

[1] The Condensed Consolidated Balance Sheet as of March 31, 2016 has been derived from the audited Consolidated Financial Statements at that date but does not include all disclosures required by generally accepted accounting principles for complete financial statements.