Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Cash Flows [Abstract]
Net income	$ 2,887	$ 73,685
Adjustments to reconcile net income to net cash used in operating activities:
Provision for (recovery of) bad debts	(535)	89
Deferred tax benefit	(71)	(2,272)
Depreciation and amortization	6,481	6,861
Amortization of debt discount and issuance costs	3,586	2,160
Interest paid-in-kind	0	1,321
Equity-based compensation	7,911	1,758
Contingent consideration	148	(1,013)
Warranty provision	302	597
Changes in operating assets and liabilities
Accounts receivable	(2,692)	(19,515)
Inventories	(6,246)	27,433
Income tax receivables	13,003	628
Prepaid expenses and other	(3,216)	7,487
Accounts payable	(10,556)	(35,555)
Accounts payable - related party	0	698
Accrued expenses and other	5,134	12,978
Income tax payable	1,410	23,236
Lease liabilities	247	0
Deferred revenue	(59,941)	(301,152)
Net cash used in operating activities	(42,148)	(200,576)
Cash flows used in investing activities
Purchase of property, plant and equipment	(570)	(168)
Investment in equity security	(10,000)	0
Net cash used in investing activities	(10,570)	(168)
Cash flows from financing activities
Proceeds from revolving credit facility	0	10
Principal payments on term loan facility	(30,000)	(57,702)
Debt issuance costs	(6,590)	0
Net cash used in financing activities	(36,590)	(57,692)
Net decrease in cash, cash equivalents and restricted cash	(89,308)	(258,436)
Cash, cash equivalents and restricted cash, beginning of period	108,441	361,257
Cash, cash equivalents, and restricted cash, end of period	$ 19,133	$ 102,821