Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows From Operating Activities:
Net loss attributable to the Company	$ (57,487)	$ (55,690)	$ (88,488)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment, and leased property	4,650	2,006	1,946
Amortization of intangible assets	590	981	2,391
Stock-based compensation	9,290	7,817	4,157
Loss on acquisition activity, net		116	(1,014)
Amortization and accelerated recognition of debt issuance costs	1,760
Loss on disposal of leased property	41		78
Provision for loss contracts related to service	(1,071)	10,050
Change in fair value of common stock warrant liability	(4,344)	(3,661)	52,260
Changes in operating assets and liabilities that provide (use) cash, net of effects of acquisitions:
Accounts receivable	10,727	(5,638)	(9,350)
Inventory	2,812	(7,251)	(9,168)
Prepaid expenses and other assets	(3,833)	(11,592)	(7,156)
Accounts payable, accrued expenses, product warranty reserve and other liabilities	10,772	7,214	10,818
Accrual for loss contracts related to service	(8,227)
Deferred revenue	4,684	8,374	2,746
Net cash used in operating activities	(29,636)	(47,274)	(40,780)
Cash Flows From Investing Activities:
Purchase of property, plant and equipment	(2,743)	(3,520)	(1,413)
Purchase for construction of leased property	(55,332)
Net cash acquired in purchase acquisitions		1,496	414
Proceeds from disposal of property, plant and equipment and leased property			34
Net cash used in investing activities	(58,075)	(2,024)	(965)
Cash Flows From Financing Activities:
Change in restricted cash	(6,787)	(47,335)
Proceeds from exercise of warrants	111	25	18,340
Proceeds from issuance of preferred stock	17,020
Preferred stock issuance costs	(1,426)
Purchase of treasury stock	(182)	(247)	(603)
Proceeds from issuance of common stock and warrants	13,000		176,700
Common stock issuance costs	(1,060)		(10,977)
Proceeds from exercise of stock options	102	167	240
Proceeds from short-term borrowing, net of transaction costs	23,673
Principal payments on short-term borrowings	(25,000)
Proceeds from borrowing of long-term debt, net of transaction costs	47,400
Principal payments on long-term debt	(25,000)
Increase in finance obligations	28,034	14,467	(777)
Net cash provided by (used in) financing activities	69,885	(32,923)	182,923
Effect of exchange rate changes on cash	(121)	(23)
Decrease in cash and cash equivalents	(17,947)	(82,244)	141,178
Cash and cash equivalents, beginning of period	63,961	146,205	5,027
Cash and cash equivalents, end of period	46,014	63,961	146,205
Other Supplemental Cash Flow Information:
Cash paid for interest	$ 8,263	553	433
Noncash investing activity - issuance of common stock for acquisitions		$ 14,459	$ 4,000