Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net loss	$ (11,762)	$ (27,793)
Adjustments to reconcile net loss to cash used in operating activities:
Stock-based compensation	4,890	4,610
Depreciation and amortization	334	121
Amortization of debt issuance cost	177	173
Provision for obsolete and slow-moving inventory	1,261	0
Gain from disposal of investment in unconsolidated subsidiary	(898)	(337)
Warranty provision	1,543	516
Warranty recoverable from manufacturer	(54)	(205)
Bad debt credit	0	(30)
Deferred income taxes	216	0
Lease expense and other	229	198
Impact on cash from changes in operating assets and liabilities:
Accounts receivable, net	(11,412)	(24,652)
Inventories	5,078	(58)
Prepaid and other current assets	817	3,440
Other assets	(882)	(40)
Accounts payable	7,882	7,258
Accruals and other current liabilities	(616)	(17,044)
Deferred revenue	(2,677)	1,679
Other non-current liabilities	(2,212)	(752)
Lease payments and other, net	(230)	(190)
Net cash used in operating activities	(8,316)	(53,106)	$ 54,500	$ 132,900
Cash flows from investing activities:
Purchases of property and equipment	(28)	(523)
Investment in Alpha Steel	(900)	0
Proceeds from disposal of investment in unconsolidated subsidiary	898	337
Net cash used in investing activities	(30)	(186)
Cash flows from financing activities:
Sale of common stock	5,450	0
Stock offering costs paid	(32)	0
Proceeds from stock option exercises	51	428
Net cash provided by financing activities	5,469	428
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(15)	62
Net decrease in cash, cash equivalents and restricted cash	(2,892)	(52,802)
Cash, cash equivalents and restricted cash at beginning of period	44,385	102,185	102,185
Cash, cash equivalents and restricted cash at end of period	41,493	49,383	$ 44,385	$ 102,185
Supplemental disclosures of cash flow information:
Purchases of property and equipment included in ending accounts payable and accruals	32	59
Stock issued for accrued legal settlement	2,000	0
Right-of-use asset and lease liability recognition for new leases	1,417	0
Cash paid during the period for third party interest	129	128
Cash paid during the period for taxes, net of refunds	$ 6	$ 7