Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016		Mar. 31, 2015
Operating Activities
Net loss	$ (21,548)		$ (24,295)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,356		2,425
Amortization of intangibles	67		27
Share-based compensation	2,809		3,833
Loss from valuation of derivative liabilities	0		1,549
Amortization of prepaid financing costs	34		34
Gain on sale of equipment	(135)		0
Changes in assets and liabilities:
Accounts receivable	(1,067)		(8,612)
Inventory	973		(197)
Prepaid expenses and other assets	(1,112)		257
Payables and accrued liabilities	(966)		(6,711)
Deferred revenues	986		8,644
Deferred rent	24		29
Net cash used in operating activities	(17,579)		(23,017)
Investing Activities
Purchases of property and equipment	(247)		(1,069)
Proceeds from sale of property and equipment	135		0
Net cash used in investing activities	(112)		(1,069)
Financing Activities
Principal payments on lease financing obligations	(687)		(570)
Proceeds from issuance of common stock	127		101,979
Net cash provided by (used in) financing activities	(560)		101,409
Effect of exchange rate changes on cash	1,600		449
Net increase (decrease) in cash and cash equivalents	(16,651)		77,772
Cash and cash equivalents at beginning of period	156,184	[1]	163,209
Cash and cash equivalents at end of period	$ 139,533		$ 240,981

[1] The balance sheet data at December 31, 2015, has been derived from audited financial statements at that date. It does not include, however, all of the information and notes required by US generally accepted accounting principles for complete financial statements.