Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows From Operating Activities:
Net loss attributable to the Company	$ (11,754)	$ (11,051)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment, and leased property	571	475
Amortization of intangible assets	145	608
Stock-based compensation	2,217	1,697
Change in fair value of common stock warrant liability	(1,278)	(1,769)
Changes in operating assets and liabilities that provide (use) cash, net of effects of acquisitions:
Accounts receivable	11,966	8,324
Inventory	(6,398)	(7,357)
Prepaid expenses and other assets	(1,832)	(902)
Note receivable	16	16
Accounts payable, accrued expenses, product warranty reserve and other liabilities	2,423	(3,160)
Accrual for loss contracts related to service	(1,748)
Deferred revenue	(1,244)	(526)
Net cash used in operating activities	(6,916)	(13,645)
Cash Flows From Investing Activities:
Purchase of property, plant and equipment	(1,889)	(229)
Purchase for construction of leased assets	(11,747)
Net cash used in investing activities	(13,636)	(229)
Cash Flows From Financing Activities:
Change in restricted cash	(31)	(718)
Proceeds from exercise of warrants	109
Proceeds from exercise of stock options		133
Proceeds from short-term borrowing, net of transaction costs	23,874
Principal payments on finance obligations	(556)
Principal payments on obligations under capital lease		(209)
Net cash provided by (used in) financing activities	23,396	(794)
Effect of exchange rate changes on cash	77
Increase (decrease) in cash and cash equivalents	2,921	(14,668)
Cash and cash equivalents, beginning of period	63,961	146,205
Cash and cash equivalents, end of period	66,882	131,537
Other Supplemental Cash Flow Information:
Cash paid for interest	$ 232	$ 91