Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities:
Net loss	$ (22,497)	$ (21,548)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,531	2,356
Amortization of intangibles	300	67
Share-based compensation	1,838	2,809
Amortization of prepaid financing costs	34	34
Gain on disposal of property and equipment		(135)
Changes in operating assets and liabilities:
Accounts receivable	18,823	(1,067)
Inventory	(216)	973
Prepaid expenses and other assets	(908)	(1,112)
Payables and accrued liabilities	(12,337)	(966)
Deferred revenues	(2,813)	986
Deferred rent	(12)	24
Net cash used in operating activities	(16,257)	(17,579)
Investing Activities:
Purchases of property and equipment	(49)	(247)
Proceeds from sale of property and equipment		135
Other non-current assets	94
Net cash provided by (used in) investing activities	45	(112)
Financing Activities:
Principal payments on lease financing obligations	(816)	(687)
Proceeds from issuance of common stock, net	5,267	127
Net cash provided by (used in) financing activities	4,451	(560)
Effect of exchange rate changes on cash	578	1,600
Net decrease in cash and cash equivalents	(11,183)	(16,651)
Cash and cash equivalents at beginning of period	90,712	156,184
Cash and cash equivalents at end of period	$ 79,529	$ 139,533