Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 19,731	$ 29,040
Adjustments to reconcile net income to net cash flows from operating activities:
Provision for credit losses on accounts receivable	547	150
Reserve for product returns	1,715	1,129
Recovery of credit losses on notes receivable	(78)	(11)
Amortization on patents and tooling	701	603
Amortization and depreciation	15,536	14,862
Amortization of debt discount and debt issuance costs	1,560	7,399
Amortization of operating leases	5,065	4,695
Deferred income taxes	(22,734)	(7,143)
Stock-based compensation	24,899	17,944
Gain on investment	(140)	0
Loss on early extinguishment of debt	0	185
Changes in operating assets and liabilities:
Accounts receivable	(4,970)	(10,565)
Inventory	(33,045)	(15,330)
Other current and non-current assets	(2,485)	(8,131)
Accounts payable, accrued expenses and other current liabilities	10,046	13,403
Deferred revenue	2,404	2,490
Operating lease liabilities	(6,100)	(5,677)
Other liabilities	(394)	265
Cash flows from operating activities	12,258	45,308
Cash flows used in investing activities:
Additions to property and equipment	(26,302)	(7,381)
Issuances of notes receivable	(3,000)	0
Receipt of payments on notes receivable	32	5
Purchase of investment in unconsolidated entity	0	(5,000)
Proceeds from investment	140	0
Cash flows used in investing activities	(29,130)	(12,376)
Cash flows (used in) / from financing activities:
Repayments of credit facility	0	(110,000)
Proceeds from issuance of convertible senior notes	0	500,000
Payments of debt issuance costs	0	(15,698)
Payments of deferred consideration for business acquisitions	0	(878)
Purchases of treasury stock	(51,499)	0
Issuances of common stock from equity-based plans	1,663	2,867
Cash flows (used in) / from financing activities	(49,836)	376,291
Net (decrease) / increase in cash, cash equivalents and restricted cash	(66,708)	409,223
Cash, cash equivalents and restricted cash at beginning of the period	710,621	253,459
Cash, cash equivalents and restricted cash at end of the period	$ 643,913	$ 662,682