Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (17,542)	$ (10,888)
Adjustments to reconcile net loss to net cash flows provided by operating activities:
Provision for loss (gains) on accounts receivable	(25)	(3)
Loss on disposal of equipment	43	60
Share-based compensation	6,295	6,080
Inventory obsolescence	(149)	129
Depreciation and amortization	8,007	7,089
Amortization of deferred financing costs and loan discount	132	617
Change in operating lease right of use asset	310	309
Loss on equity method investment	1,310	236
Changes in operating assets and liabilities:
Accounts receivable	(26,653)	(10,378)
Inventories	(9,588)	(2,835)
Prepaid expenses and other current assets	717	(140)
Other assets	(990)	137
Accounts payable	5,449	6,248
Accrued expenses	(1,811)	(1,801)
Other lease liabilities	(290)	(345)
Net cash flows used in operating activities	(34,785)	(5,485)
CASH FLOWS FROM INVESTING ACTIVITIES:
Investments in equity method investment	(3,294)	0
Acquisitions of property, plant and equipment, software and deposits on equipment	(55,888)	(49,334)
Net cash flows used in investing activities	(59,182)	(49,334)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from common shares issued in primary offering, net of issuance cost	0	332,520
Proceeds from exercise of options to purchase common stock	232	714
Tax withholdings related to net shares settlements of restricted stock units	(323)	(1,529)
Proceeds from borrowings under Credit Facility	51,000	0
Fees paid in connection with financing agreements	0	(3,166)
Net cash flows provided by financing activities	50,909	328,539
NET CHANGE IN CASH AND CASH EQUIVALENTS	(43,058)	273,720
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	72,788	67,247
CASH AND CASH EQUIVALENTS, END OF PERIOD	29,730	340,967
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid	421	208
NON-CASH FINANCING AND INVESTING ACTIVITIES:
Property, plant and equipment purchases in accounts payable	$ 51,572	$ 19,536