Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net loss	$ (12,551)	$ (15,496)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	3,332	3,902
Non-cash lease expense	689	673
Change in fair value of warrant and derivative liabilities	(3,413)	0
Loss on derecognition of debt	1,402	0
Amortization of debt discount and issuance costs	4,055	0
Stock based compensation	1,975	2,754
Gain on disposal of assets	11	0
Changes in operating accounts:
Accounts receivable	(1,373)	(975)
Prepaid expenses and other assets	69	(527)
Accounts payable and accrued liabilities	(2,309)	(1,812)
Other liabilities	622	(146)
Net cash used in operating activities	(7,491)	(11,627)
Investing activities:
Capital expenditures, net	3
Capital expenditures, net		(112)
Other investing activities	71	83
Net cash provided by (used in) investing activities	74	(29)
Financing activities:
Proceeds from financing arrangements	442	1,291
Repayments of financing arrangements	(642)	(391)
Other financing activities	8	35
Net cash (used in) provided by financing activities	(192)	935
Net decrease in cash and cash equivalents	(7,609)	(10,721)
Cash and cash equivalents, beginning of period	14,026	16,078
Cash and cash equivalents, end of period	6,417	5,357
Non-cash investing and financing activities:
Issuance of common stock in settlement and prepayment of notes payable	$ 7,500	$ 0