CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net loss	$ (41,541)	$ (43,379)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,257	2,989
Share-based compensation expense	3,531	4,097
Change in fair value of derivative financial instruments	397	(393)
Unrealized foreign exchange results	1,168	1,303
Change in deferred taxes		224
Change in lease incentive	1,634	(306)
Changes in operating assets and liabilities:
Accounts receivable, prepaid expenses and other current assets	5,096	(1,307)
Inventories		80
Accounts payable	(1,334)	(1,868)
Accrued expenses and other liabilities	(696)	2,982
Deferred revenue	(3,315)	(2,891)
Net cash used in operating activities	(30,803)	(38,469)
Cash flows from investing activities
Restricted cash		(617)
Purchase of intangible assets	(578)
Purchase of property, plant and equipment	(2,830)	(3,553)
Net cash used in investing activities	(3,408)	(4,170)
Cash flows from financing activities
Proceeds from issuance of shares	939	2,195
Repayment of capital lease obligations		(98)
Net cash generated from financing activities	939	2,097
Currency effect cash and cash equivalents	4,863	2,848
Net increase / (decrease) in cash and cash equivalents	(28,409)	(37,694)
Cash and cash equivalents at beginning of period	132,496	221,626
Cash and cash equivalents at the end of period	104,087	183,932
Supplemental cash flow disclosures:
Cash paid for interest	840	1,118
Non-cash adjustments in purchases of intangible assets and property, plant and equipment	$ (1,108)	$ 2,218