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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Operating activities:    
Net loss $ (10,608,000) $ (5,824,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation of property and equipment 120,000 59,000
Amortization of intangible assets 363,000 60,000
Goodwill, intangible and other asset impairment 6,737,000 0
Impairment of property, plant and equipment 66,000 0
Issuance of warrants in connection with the TLF Warrants 0 13,000
Non-cash gain on changes in fair value of warrant liability (5,446,000) (4,615,000)
Non-cash gain on changes in fair value of contingent liability (561,000) 0
Non-cash loss on modification of common stock warrants 1,922,000 0
Changes in operating assets and liabilities:    
Accounts receivable (305,000) 452,000
Inventory (217,000) (243,000)
Prepaid expenses and other current assets 218,000 (52,000)
Operating lease right-of-use assets (1,420,000) 25,000
Other assets (5,000) 0
Accounts payable and accrued liabilities 667,000 (163,000)
Operating lease liabilities 1,595,000 (57,000)
Net cash used in operating activities (6,654,000) (9,192,000)
Investing activities:    
Acquisition, net of cash 0 (11,993,000)
Purchases of property and equipment (112,000) (52,000)
Net cash used in investing activities (112,000) (12,045,000)
Financing activities:    
Proceeds from common stock issuances, net 0 1,776,000
Proceeds from exercise of warrants 1,703,000 0
Draws (payments) on the line of credit (105,000) 105,000
Net cash provided by financing activities 4,633,000 16,789,000
Net (decrease) increase in cash, cash equivalents, and restricted cash (2,133,000) (4,448,000)
Cash, cash equivalents and restricted cash, beginning of year 7,979,000 12,427,000
Cash, cash equivalents and restricted cash, end of year 5,846,000 7,979,000
Supplemental disclosure of cash flow information:    
Interest paid 17,000 0
Income taxes paid 24 21
Warrant & Equity liability transferred to equity related to warrant modification 9,353,000 0
Equity transferred to warrant liability related to warrant modification 3,825,000 0
Addition of operating lease, right-of-use asset 2,039,000 376,000
Fair value of warrants issued in connection with financings 0 14,172,000
Conversion of Preferred Stock to common stock 0 0
Series B Preferred Stock [Member]    
Financing activities:    
Proceeds from Series B Preferred Stock issuances, net 0 14,908,000
Series C Preferred Stock [Member]    
Financing activities:    
Proceeds from Series C Preferred Stock and warrant issuances, net 3,035,000 0
Share-Based Payment Arrangement, Nonemployee [Member]    
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 0 240,000
Issuance of RSUs to non-employees for services 0 220,000
Employees and Directors [Member]    
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 220,000 693,000
Conversion of Series B Preferred Stock to Common Stock [Member]    
Supplemental disclosure of cash flow information:    
Conversion of Preferred Stock to common stock 110,000 55,000
Conversion of Series C Preferred Stock to Common Stock [Member]    
Supplemental disclosure of cash flow information:    
Conversion of Preferred Stock to common stock $ 632,000 $ 0