Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (10,888)	$ (3,590)
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Provision for loss/(gains) on accounts receivable	(3)	91
Loss on disposal of equipment	60	2
Share-based compensation	6,080	2,178
Inventory obsolescence	129	118
Depreciation and amortization	7,089	4,453
Amortization of deferred financing costs and loan discount	617	625
Investments in equity method investment	236	0
Changes in operating assets and liabilities:
Accounts receivable	(10,378)	(1,805)
Inventories	(2,835)	(3,581)
Prepaid expenses and other current assets	(140)	10
Operating lease right of use	309	308
Other assets	137	12
Accounts payable	6,248	656
Accrued expenses	(1,801)	(1,692)
Other lease liabilities	(345)	(284)
Net cash flows used in operating activities	(5,485)	(2,501)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of short-term investments	0	(20,000)
Acquisitions of property, plant and equipment, software and deposits on equipment	(49,334)	(34,238)
Net cash flows used in investing activities	(49,334)	(54,238)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from common shares issued in primary offering, net of issuance cost	332,520	252,062
Proceeds from exercise of options to purchase common stock	714	403
Tax withholdings related to net shares settlements of restricted stock units	(1,529)	(645)
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	(3,166)	0
Net cash flows provided by financing activities	328,539	196,753
NET CHANGE IN CASH AND CASH EQUIVALENTS	273,720	140,014
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	67,247	9,472
CASH AND CASH EQUIVALENTS, END OF PERIOD	340,967	149,486
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid	208	767
NON-CASH FINANCING AND INVESTING ACTIVITIES:
Property, plant and equipment purchases in accounts payable	$ 19,536	$ 8,672