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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (1,703) $ (5,331)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 306 609
Depreciation and amortization 175 41
Fair value of warrants issued for services 625 222
Change in fair value of warrant liability, net of issuance costs of $645 (9,628)
Excess warrant fair value 6,453
Forgiveness of indebtedness income (1,265)
 Changes in operating assets and liabilities:    
Accounts receivable 136 201
Operating lease liabilities, net (25) (19)
Prepaid expenses and other current assets 102 (680)
Deposits 79 3
Accounts payable 84 (42)
Accrued expenses 28 419
Other liabilities (31)
Contract liability (140) (240)
Net cash used in operating activities (3,539) (6,082)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Acquisitions of property and equipment (239) (120)
Payment for asset purchase (50)
Net cash used in investing activities (289) (120)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from the private placement of common stock and pre-funded warrant 8,000
Payments for issuance costs (645)
Net cash provided by financing activities 7,355
Net decrease in cash and cash equivalents 3,527 (6,202)
Cash and cash equivalents at beginning of year 3,519 24,030
Cash and cash equivalents at end of year 7,046 17,828
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:    
Cash paid for interest 2
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:    
Fair value of pre-funded warrants exercised 1
Fair value of common stock issued in asset purchase $ 116