Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net loss	$ (15,252)	$ (10,355)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	4,345	1,871
Stock-based compensation expense	754	999
Provision for excess and obsolete inventory	250	272
Change in fair value of derivatives and warrants	(925)	678
Non-cash interest expense	19	56
Other non-cash items	718	(307)
Changes in operating asset and liability accounts:
Accounts receivable	319	12,192
Inventory	1,719	(10,750)
Prepaid expenses and other current assets	(273)	1,555
Accounts payable and accrued expenses	(404)	1,650
Deferred revenue	3,300	79
Net cash used in operating activities	(5,430)	(2,060)
Cash flows from investing activities:
Purchase of property, plant and equipment	(76)	(281)
Proceeds from the sale of property, plant and equipment	10	15
Change in restricted cash	695	16
Change in other assets	(23)	(21)
Net cash provided by/(used in) investing activities	606	(271)
Cash flows from financing activities:
Employee taxes paid related to net settlement of equity awards	(274)	(461)
Repayment of debt	(1,575)	(1,000)
Proceeds from public equity offering, net	16,954	0
Net cash provided by/(used in) financing activities	15,105	(1,461)
Effect of exchange rate changes on cash and cash equivalents	412	(327)
Net increase/(decrease) in cash and cash equivalents	10,693	(4,119)
Cash and cash equivalents at beginning of year	26,784	39,330
Cash and cash equivalents at end of year	37,477	35,211
Supplemental schedule of cash flow information:
Cash paid for income taxes, net of refunds	96	112
Issuance of common stock to settle liabilities	90	107
Cash paid for interest	$ 42	$ 108