Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows From Operating Activities:
Net loss attributable to the Company	$ (45,703)	$ (66,658)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment, and leased property	5,795	4,183
Amortization of intangible assets	335	290
Stock-based compensation	4,325	4,792
Amortization of debt issuance costs and discount on convertible senior notes	2,438	296
Provision for common stock warrants	5,806	8,513
Change in fair value of common stock warrant liability	(1,592)	14,576
Income tax benefit	(5,865)
Changes in operating assets and liabilities that provide (use) cash:
Accounts receivable	(16,178)	(3,345)
Inventory	6,488	(12,763)
Prepaid expenses and other assets	1,556	66
Accounts payable, accrued expenses, and other liabilities	(6,685)	(6,746)
Accrual for loss contracts related to service		(752)
Deferred revenue	4,101	(787)
Net cash used in operating activities	(45,179)	(58,335)
Cash Flows From Investing Activities:
Purchases of property, plant and equipment	(2,343)	(1,057)
Purchase of intangible asset	(879)
Purchases for construction of leased property	(13,138)	(19,488)
Net cash used in investing activities	(16,360)	(20,545)
Cash Flows From Financing Activities:
Proceeds from exercise of warrants, net of transaction costs		17,702
Proceeds from exercise of stock options	67	37
Payments for redemption of preferred stock		(3,700)
Proceeds from public offerings, net of transaction costs		19,534
Proceeds from issuance of convertible senior notes, net	95,856
Purchase of capped call and common stock forward	(43,500)
Proceeds from borrowing of long-term debt, net of transaction costs		621
Principal payments on long-term debt	(5,721)	(1,278)
Proceeds from sale/leaseback transactions accounted for as capital leases	20,000	3,613
Repayments of finance obligations	(17,760)	(4,321)
Net cash provided by financing activities	48,942	32,208
Effect of exchange rate changes on cash	(36)	158
Decrease in cash, cash equivalents and restricted cash	(12,633)	(46,514)
Cash, cash equivalents, and restricted cash beginning of period	68,055	100,636
Cash, cash equivalents, and restricted cash end of period	55,422	54,122
Other Supplemental Cash Flow Information:
Cash paid for interest	$ 4,915	3,848
Noncash financing activity-conversion of preferred stock to common stock		$ 7,778