Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net loss	$ (6,887)	$ (7,002)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,699	1,998
Non-cash lease expense	344	338
Change in fair value of warrant and derivative liabilities	(2,984)	0
Loss on derecognition of debt	627	0
Amortization of debt discount and issuance costs	2,117	0
Provision for doubtful accounts	0	5
Stock based compensation	945	1,065
Gain on disposal of assets	(3)	0
Changes in operating accounts:
Accounts receivable	(685)	(1,472)
Prepaid expenses and other assets	163	(218)
Accounts payable and accrued liabilities	(436)	(1,172)
Other liabilities	(235)	(131)
Net cash used in operating activities	(5,335)	(6,589)
Investing activities:
Capital expenditures, net	3
Capital expenditures, net		(63)
Other investing activities	0	12
Net cash provided by (used in) investing activities	3	(51)
Financing activities:
Proceeds from financing arrangements	442	541
Repayments of financing arrangements	(420)	(181)
Other financing activities	8	33
Net cash provided by financing activities	30	393
Net decrease in cash and cash equivalents	(5,302)	(6,247)
Cash and cash equivalents, beginning of period	14,026	16,078
Cash and cash equivalents, end of period	8,724	9,831
Non-cash investing and financing activities:
Issuance of common stock in settlement and prepayment of notes payable	$ 3,000	$ 0