Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net loss	$ (43,053,000)	$ (36,886,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	3,404,000	6,518,000
(Gain) Loss on disposals of assets, net	(40,000)	360,000
Impairment of goodwill	0	482,000
Impairment of other noncurrent assets	0	638,000
Gain on debt retirement	(60,000)	0
Amortization of (discounts) premiums on investments, net	(721,000)	468,000
Equity in net loss of affiliates	0	1,000
Stock-based compensation expense	5,320,000	5,871,000
Shares issued as payment for services	545,000	576,000
Provision for credit losses	0	735,000
Accretion of debt discount and amortization of deferred financing costs	60,000	596,000
Deferred income taxes	(113,000)	(112,000)
Other noncash items	1,000	105,000
Receivables:
Trade	(376,000)	(7,016,000)
Other	(226,000)	10,000
Prepaid expenses and other	2,274,000	4,284,000
Other assets	83,000	2,000
Accounts payable	(1,537,000)	(963,000)
Accrued compensation and benefits	1,804,000	(1,015,000)
Other accrued liabilities	(1,740,000)	1,862,000
Deferred revenue	(10,000)	(2,184,000)
Lease liabilities	229,000	(40,000)
Related party payables	0	(78,000)
Other long-term liabilities	0	(50,000)
Net cash used in operating activities	(34,156,000)	(25,836,000)
Cash flows from investing activities
Purchases of investments	(128,563,000)	0
Sales and maturities of investments	101,852,000	36,000,000
Purchases of property, plant and equipment	(255,000)	(3,297,000)
Proceeds from sale of assets	61,000	438,000
Net cash (used in) provided by investing activities	(26,905,000)	33,141,000
Cash flows from financing activities
Proceeds from issuance of shares, net of issuance costs	72,808,000	0
Payments of long-term debt	(43,099,000)	(277,000)
Payments of cost to retire long-term debt	(120,000)	0
Proceeds from stock option exercises	0	1,000
Net cash provided by(used in) financing activities	29,589,000	(276,000)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(172,000)	(471,000)
Net decrease in cash, cash equivalents, and restricted cash	(31,644,000)	6,558,000
Cash, cash equivalents, and restricted cash
Beginning of period	48,596,000	43,343,000
End of period	16,952,000	49,901,000
Supplemental disclosure of cash flow information
Cash paid during the period for interest	1,156,000	3,568,000
Accrued compensation paid in equity awards	3,361,000	1,698,000
Purchases of property and equipment included in accounts payable and other accrued liabilities	19,000	234,000
Proceeds from sale of assets included in accounts receivable	0	147,000
Cash, cash equivalents, and restricted cash
Cash and cash equivalents	16,546,000
Restricted cash	0
Restricted cash included in other assets	406,000
Cash, cash equivalents, and restricted cash	$ 16,952,000	$ 49,901,000