Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (20,433)	$ 109
Adjustments to reconcile net (loss) income to net cash flows provided by operating activities:
Provision for loss (gains) on accounts receivable	15	(4)
Loss on disposal of equipment	284	1,301
Share-based compensation	18,516	7,811
Inventory obsolescence	249	147
Depreciation and amortization	22,489	14,946
Amortization of deferred financing costs and loan discount	1,013	763
Change in operating lease right of use asset	992	962
Loss on equity method investment	1,124	0
Changes in operating assets and liabilities:
Accounts receivable	(13,794)	(3,060)
Inventories	(10,435)	(5,115)
Prepaid expenses and other current assets	(1,140)	9,587
Other assets	(5,520)	(222)
Accounts payable	5,057	(3,021)
Accrued expenses	(781)	(10,300)
Other lease liabilities	(971)	(842)
Net cash flows (used in) provided by operating activities	(3,335)	13,063
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of short-term investments	0	(20,001)
Proceeds from maturities of short-term investments	0	10,001
Investments in equity method investment	0	(27,625)
Acquisitions of property, plant and equipment, software and deposits on equipment	(220,835)	(99,924)
Net cash flows used in investing activities	(220,835)	(137,549)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from common shares issued in primary offering, net of issuance cost	332,172	252,062
Proceeds from exercise of options to purchase common stock	2,048	4,664
Tax withholdings related to net shares settlements of restricted stock units	(3,198)	(1,636)
Proceeds from borrowings under Credit Facilities	0	20,933
Repayment of borrowings under Credit Facilities	0	(76,000)
Fees paid in connection with financing agreements	(3,263)	(824)
Net cash flows provided by financing activities	327,759	199,199
NET CHANGE IN CASH AND CASH EQUIVALENTS	103,589	74,713
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	67,247	9,472
CASH AND CASH EQUIVALENTS, END OF PERIOD	170,836	84,185
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid	1,288	925
NON-CASH FINANCING AND INVESTING ACTIVITIES:
Property, plant and equipment purchases in accounts payable	$ 2,599	$ 2,670