Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating Activities
Net loss	$ (14,380)	$ (6,836)	$ (42,690)	$ (22,132)
Adjustments to reconcile net loss to net cash used in operating activities:
Loss (gain) from change in fair value of derivative warrant liability			4	(8)
Loss (gain) from change in fair value of 2020/21 Notes and 2020 Notes embedded derivative liability	0	(247)	0	29
Loss on conversion of 2020/21 Notes to common stock	0	543	0	543
Loss on disposal of assets	183	0	5,137	38
(Gain) on forgiveness of SBA Loans	0	0	(641)	0
Stock-based compensation			5,823	1,347
Depreciation and amortization	1,200	1,476	3,572	4,754
Non-cash lease expense			7	45
Non-cash interest expense			65	606
Other non-cash expenses			5	0
Changes in operating assets and liabilities:
Accounts receivable			14	765
Inventories			150	650
Prepaid expenses and other current assets, deposits and other assets			(4,463)	(613)
Accounts payable, accrued expenses and long-term liabilities			4,324	(605)
Net cash used in operating activities			(28,693)	(14,581)
Investing Activities
Acquisitions of property, plant and equipment			(30,955)	(1,756)
Acquisition of patent portfolio			(9,000)	0
Proceeds from sale of marketable securities			34,332	0
Purchase of marketable securities			(422,362)	0
Net cash used in investing activities			(427,985)	(1,756)
Financing Activities
Proceeds from issuance of 2021 Bonds			68,995	0
Debt and equity offering costs			(34,919)	(6,170)
Proceeds from issuance of common stock and common stock warrants			487,549	69,985
Proceeds from exercise of warrants			1,119	16,647
Net settlement of common stock under stock plans			(5,137)	(331)
Payment of loans payable - other			(98)	(481)
Payment of finance lease liabilities			(2,996)	0
Proceeds from SBA Loans			0	1,006
Net cash provided by financing activities			514,513	80,656
Net increase (decrease) in cash and cash equivalents			57,835	64,319
Cash, cash equivalents and restricted cash
Beginning of period			78,338	16,302
End of period	136,173	80,621	136,173	80,621
Cash and cash equivalents	16,201	80,621	16,201	80,621
Restricted cash (current)	49,804	0	49,804	0
Long-term restricted cash	70,168	0	70,168	0
Total cash, cash equivalents and restricted cash	$ 136,173	$ 80,621	136,173	80,621
Cash paid for interest			11	953
Non-cash purchase of property, plant and equipment			12,164	2
Issuance of common stock upon exchange of debt and make-whole			0	2,517
Issuance of common stock in exchange for services rendered			0	94
Original issue discount paid with 2020/21 Notes			0	282
Right-of-use asset purchased with financing leases			28,416	13
Right-of-use asset purchased with operating lease			$ 1,611	$ 0