CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net loss	$ (42,844)	$ (22,903)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	9,315	3,850
Stock-based compensation	10,184	4,474
Amortization of debt discount and debt issuance costs	489	640
Amortization of right-of-use assets	563	1,022
Write-down for excess and obsolete inventories	1,706	2,096
Loss on disposal of assets	474	369
Other	(243)	299
Changes in operating assets and liabilities:
Accounts receivable	1,674	(1,891)
Inventories	(9,154)	(13,471)
Prepaid expenses and other current assets	(1,848)	1,367
Other assets	(119)
Accounts payable	7,637	2,160
Accrued expenses and other current liabilities	(1,268)	2,958
Lease liability	(562)	31
Other long-term liabilities	(716)	395
Net cash used in operating activities	(24,712)	(18,604)
Investing activities:
Purchase of property and equipment	(13,257)	(15,202)
Purchase of intangible assets	(150)
Purchase of debt and equity securities		(9,081)
Settlement of forward contract		(1,711)
Net cash used in investing activities	(13,407)	(25,994)
Financing activities:
Proceeds from common stock offering		131,838
Net cash received (paid) from common stock exercises	1,301	(1,048)
Proceeds from financed insurance	1,617
Other	(221)	(14)
Net cash provided by financing activities	2,697	130,776
Effect of exchange rate changes on cash	(14)	(2,806)
Net (decrease) increase in cash and cash equivalents	(35,436)	83,372
Cash and cash equivalents at beginning of period	187,248	107,765
Cash and cash equivalents at end of period	151,812	191,137
Supplemental disclosure of cash flow information:
Cash paid for interest	1,252	1,783
Cash paid for income taxes		21
Supplemental disclosure of noncash activities:
Financed insurance	1,617
Purchases of property and equipment in accounts payable and accrued expenses	$ 4,667	8,030
Recognition of lease liability		$ 21,505