Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Activities
Net loss attributable to the Company	$ (37,479)	$ (30,952)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment, and leased property	2,850	2,776
Amortization of intangible assets	175	175
Stock-based compensation	3,045	2,497
Provision for bad debts and other assets		307
Amortization of debt issuance costs and discount on convertible senior notes	2,716	2,469
Provision for common stock warrants	2,566	1,193
Change in fair value of common stock warrant liability		2,126
Changes in operating assets and liabilities that provide (use) cash:
Accounts receivable	1,011	4,978
Inventory	(20,581)	(17,564)
Prepaid expenses, and other assets	(10,794)	1,018
Accounts payable, accrued expenses, and other liabilities	(2,933)	(2,781)
Deferred revenue	(591)	(2,505)
Net cash used in operating activities	(60,015)	(36,263)
Investing Activities
Purchases of property, plant and equipment	(2,507)	(1,468)
Purchases for construction of leased property	(3,848)	(806)
Net cash used in investing activities	(6,355)	(2,274)
Financing Activities
Proceeds from issuance of preferred stock, net of transaction costs		(3)
Proceeds from public offerings, net of transaction costs		23,498
Proceeds from exercise of stock options	6,104	81
Principal payments on long-term debt	(5,315)	(17,153)
Proceeds from long-term debt		84,761
Repayments of finance obligations	(5,730)	(53,534)
Increase in finance obligations	9,024
Net cash provided by financing activities	4,083	37,650
Effect of exchange rate changes on cash	1	(35)
Decrease in cash, cash equivalents and restricted cash	(62,286)	(922)
Cash, cash equivalents, and restricted cash beginning of period	369,500	110,153
Cash, cash equivalents, and restricted cash end of period	307,214	109,231
Supplemental disclosure of cash flow information
Cash paid for interest	5,155	$ 4,858
Summary of non-cash investing and financing activity
Recognition of right of use asset	6,189
Conversion of preferred stock to common stock	$ 441