Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net loss	$ (22,533)	$ (17,680)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	7,682	3,735
Stock-based compensation expense	1,232	1,653
Provision for excess and obsolete inventory	351	671
Gain on sale of minority interest	(951)	0
Change in fair value of warrants and contingent consideration	(1,270)	(567)
Non-cash interest expense	19	98
Other non-cash items	(97)	(103)
Changes in operating asset and liability accounts:
Accounts receivable	124	7,118
Inventory	1,354	(8,696)
Prepaid expenses and other current assets	85	2,843
Accounts payable and accrued expenses	(770)	(4,481)
Deferred revenue	1,235	4,497
Net cash used in operating activities	(13,539)	(10,912)
Cash flows from investing activities:
Purchase of property, plant and equipment	(483)	(359)
Proceeds from the sale of property, plant and equipment	12	15
Change in restricted cash	795	4
Cash paid for acquisition, net of cash acquired	134	0
Proceeds from sale of minority interest	951	0
Change in other assets	(130)	(28)
Net cash provided by/(used in) investing activities	1,279	(368)
Cash flows from financing activities:
Employee taxes paid related to net settlement of equity awards	(274)	(490)
Repayment of debt	(1,575)	(2,000)
Proceeds from public equity offering, net	16,952	0
Proceeds from exercise of employee stock options and ESPP	85	0
Net cash provided by/(used in) financing activities	15,188	(2,490)
Effect of exchange rate changes on cash and cash equivalents	608	(298)
Net increase/(decrease) in cash and cash equivalents	3,536	(14,068)
Cash and cash equivalents at beginning of year	26,784	39,330
Cash and cash equivalents at end of year	30,320	25,262
Supplemental schedule of cash flow information:
Issuance of common stock in connection with the purchase of Infinia Technology Corporation	3,557	0
Cash paid for income taxes, net of refunds	753	894
Issuance of common stock to settle liabilities	185	212
Cash paid for interest	$ 42	$ 187