Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (19,484)	$ (6,250)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	2,128	2,638
Accretion of interest on convertible note - related party	819
Amortization of convertible note issuance costs	4	3
Provision for bad debt	(5)	(95)
Stock-compensation expense	1,828	976
Reduction in the carrying amount of operating lease right-of-use assets	570	257
Changes in operating assets and liabilities:
Accounts receivable	(4,102)	(4,875)
Inventories	(3,518)	2,252
Prepaid expenses and other assets	(374)	630
Accounts payable	3,063	1,432
Accrued expenses	(3,082)	1,422
Deferred revenue	(120)	31
Operating lease liabilities	(556)	(293)
Net cash used in operating activities	(22,829)	(1,872)
Cash flows from investing activities:
Capital expenditures	(14,504)	(1,470)
Net cash used in investing activities	(14,504)	(1,470)
Cash flows from financing activities:
Proceeds from issuance of convertible note related party	100,000
Issuance costs from convertible note	(185)
Proceeds from employee stock option exercises	38	463
Payments made for employee restricted stock tax withholdings	(2,315)	(2,613)
Proceeds from private placement of common stock	50,000
Fees and issuance costs from private placement of common stock	(136)
Repayment of prepayment liability	(4,728)
Net cash provided by financing activities	165,946	4,065
Net increase in cash	128,613	723
Cash and cash equivalents at beginning of period	76,564	16,496
Cash and cash equivalents at end of period	205,177	17,219
Supplemental disclosures of cash flow information:
Interest paid	52	65
Income taxes paid	0	0
Supplemental disclosures of non-cash activities:
Right-of-use assets obtained in exchange for new operating lease liabilities	68	888
Changes in accrued capital expenditures	9,566	176
At The Market Offering [Member]
Cash flows from financing activities:
Proceeds from offering, net	23,590	6,232
Fees and issuance costs from at-the-market offering	$ (318)	$ (17)