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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Operating activities:    
Net loss: $ (4,390) $ (2,623)
     Adjustments to reconcile net loss to cash used in operating activities:    
     Depreciation and amortization 742 567
     Share-based compensation 773 625
     Changes in assets and liabilities related to operations:    
     Trade accounts receivable 1,064 (797)
     Inventories (1,192) (2,744)
     Prepaid expenses and other assets (216) 44
     Accounts payable (503) 1,826
     Deferred revenue 165 744
     Accrued expenses (146) 77
     Net changes in right-of-use assets and lease liabilities – operating 1,697 631
Net cash used in operating activities (2,006) (1,650)
Investing activities:    
Acquisition of equipment and leasehold improvements (1,051) (2,823)
Net cash used in investing activities (1,051) (2,823)
Financing activities:    
Principal payment on finance leases (111)
(Payments) proceeds to line of credit – accounts receivable, related party (1,472) 2,931
Proceeds from line of credit – inventory, related party 2,000 3,000
Payments to term loans, related party (1,346)
Proceeds from term loans, related party 3,338
Proceeds from exercise of stock options 73 182
Net cash provided by financing activities 2,593 6,002
(Decrease) increase in cash (464) 1,529
Cash at beginning of period 2,186 657
Cash at end of period 1,722 2,186
Supplemental cash flow information:    
Cash paid for interest 752 333
Supplemental non-cash investing and financing activity:    
Accounts payable incurred for the purchase of equipment and leasehold improvements 400 971
Right-of-use asset obtained in exchange for a lease liability $ 182