Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities
Net loss attributable to the Company	$ (73,728)	$ (61,268)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment, and leased property	8,944	8,592
Amortization of intangible assets	518	511
Stock-based compensation	7,927	6,389
Provision for bad debts and other	1,253	746
Amortization of debt issuance costs and discount on convertible senior notes	6,257	4,436
Provision for common stock warrants	10,244	7,932
Change in fair value of common stock warrant liability	(7)	(3,308)
Loss on disposal of leased assets	212
Income tax benefit		(7,581)
Changes in operating assets and liabilities that provide (use) cash:
Accounts receivable	11,702	(9,390)
Inventory	(32,691)	12,554
Prepaid expenses and other assets	427	1,272
Accounts payable, accrued expenses, and other liabilities	13,293	(7,609)
Deferred revenue	(6,152)	5,082
Net cash used in operating activities	(51,801)	(41,642)
Investing Activities
Purchases of property, plant and equipment	(4,635)	(3,268)
Purchases of intangible assets	(1,860)	(879)
Purchases for construction of leased property	(2,851)	(13,381)
Proceeds from sale of leased assets	375
Net cash used in investing activities	(8,971)	(17,528)
Financing Activities
Proceeds from issuance of preferred stock, net of transaction costs	(37)
Proceeds from public offerings, net of transaction costs	38,098	4,912
Proceeds from exercise of stock options	(116)	92
Payments for redemption of preferred stock	(4,040)
Proceeds from issuance of convertible senior notes, net	39,052	95,856
Purchase of capped call and common stock forward		(43,500)
Principal payments on long-term debt	(21,186)	(11,944)
Proceeds from long-term debt	99,496
Proceeds from sale/leaseback transactions accounted for as finance leases		32,938
Repayments of finance obligations	(59,461)	(25,138)
Increase in finance obligations	57,249
Net cash provided by financing activities	149,055	53,216
Effect of exchange rate changes on cash	(119)	(49)
Increase (decrease) in cash, cash equivalents and restricted cash	88,164	(6,003)
Cash, cash equivalents, and restricted cash beginning of period	110,153	68,055
Cash, cash equivalents, and restricted cash end of period	198,317	62,052
Supplemental disclosure of cash flow information
Cash paid for interest	15,041	10,338
Summary of non-cash investing and financing activity
Recognition of right of use asset	78,626	58,577
Net transfers between inventory, leased assets and property, plant and equipment		17,206
Increase in property, plant and equipment financed as long-term debt or financing leases		$ 408
Conversion of preferred stock to common stock	$ 1,883