Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating activities:
Net loss	$ (24,396)	$ (29,279)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	7,395	7,556
Non-cash lease expense	(191)	(306)
Non-cash transaction costs including amortization of debt discount and issuance costs	5,993	3,324
Change in fair value of warrant and derivative liabilities	(4,214)	(4,669)
Loss on derecognition of debt	3,991	0
Stock based compensation	4,835	4,948
Deferred income taxes	(10)	61
Loss on disposal of assets	12	4
Changes in operating accounts:
Accounts receivable	2,589	85
Prepaid expenses and other assets	12	(25)
Accounts payable and accrued liabilities	(2,825)	(1,120)
Other liabilities	(164)	160
Net cash used in operating activities	(6,973)	(19,261)
Investing activities:
Capital expenditures, net	(4)	(49)
Other investing activities	136	164
Net cash provided by investing activities	132	115
Financing activities:
Proceeds from notes and warrants offering	0	15,000
Proceeds from stock and warrants offering	0	3,000
Stock, notes, and warrants offering costs	0	(1,227)
Proceeds from financing arrangements	981	1,541
Repayments of financing arrangements	(1,036)	(1,278)
Other financing activities	(5)	58
Net cash (used in) provided by financing activities	(60)	17,094
Net decrease in cash and cash equivalents	(6,901)	(2,052)
Cash and cash equivalents, beginning of period	14,026	16,078
Cash and cash equivalents, end of period	7,125	14,026
Supplemental disclosures of cash flow information:
Cash paid for income taxes	187	253
Non-cash investing and financing activities:
Issuance of common stock in settlement and prepayment of notes payable	15,000	0
Derivative and warrants in connection with notes and stock offerings	$ 0	$ 9,561