Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (13,583)	$ (23,845)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,106	2,396
Depreciation and amortization	621	669
Loss on disposal of assets		36
Fair value of common stock issued for services	87
Fair value of warrants issued for services	737	711
Change in fair value of warrant liability, net of issuance costs of $645	(10,231)
Excess warrant fair value	6,453
Forgiveness of indebtness income		(1,265)
Changes in operating assets and liabilities:
Accounts receivable	255	746
Operating lease liabilities, net	(109)	7
Tenant improvement allowance		516
Prepaid expenses and other current assets	832	126
Deposits	80	(16)
Accounts payable	734	491
Accrued expenses	422	(941)
Employee retention credit liability	1,220
Other liabilities	41	144
Contract liability	(611)	638
Net cash used in operating activities	(11,946)	(19,587)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of property and equipment	(803)	(924)
Payment for asset purchase	(50)
Net cash used in investing activities	(853)	(924)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from the private placement of common stock and pre-funded warrants	12,000
Payments for issuance costs	(1,077)
Net cash provided by financing activities	10,923
Net increase (decrease) in cash and cash equivalents	(1,876)	(20,511)
Cash and cash equivalents at beginning of year	3,519	24,030
Cash and cash equivalents at end of year	1,643	3,519
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Fair value of warrants issued in asset purchase	$ 116