Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016		Jun. 30, 2015
Adjustments to reconcile net loss to net cash provided by operating activities:
Net loss	$ (10,539)		$ (7,404)
Depreciation	1,570		1,838
Amortization of bond premium	226		0
Stock-based compensation expense	8,165		6,092
Gain on short-term investments and other, net	(26)		(1,455)
Tax effect on other comprehensive loss	(94)		0
Changes in operating assets and liabilities:
Accounts receivable	102		882
Inventories	3,552		3,723
Other assets	(70)		2,464
Accounts payable	(2,382)		(3,453)
Accrued payroll and other accrued liabilities	1,077		220
Veloce accrued liability	(8)		(65)
Deferred revenue	1		7
Net cash provided by operating activities	1,574		2,849
Investing activities:
Proceeds from sales and maturities of short-term investments	18,461		7,444
Purchases of short-term investments	(17,739)		(1,129)
Proceeds from sale of property and equipment	2		25
Purchases of property and equipment	(2,547)		(315)
Net cash provided by (used for) investing activities	(1,823)		6,025
Financing activities:
Proceeds from issuance of common stock	32		133
Funding of restricted stock units withheld for taxes and other	(623)		(1,212)
Net cash used for financing activities	(591)		(1,079)
Net increase (decrease) in cash and cash equivalents	(840)		7,795
Cash and cash equivalents at beginning of period	25,065	[1]	36,495
Cash and cash equivalents at end of period	24,225		44,290
Supplementary cash flow disclosures:
Cash paid for income taxes	167		145
Common stock issued for Veloce merger consideration	$ 0		$ 921

[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.