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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited Consolidated Condensed) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Operating activities:    
Net income $ 1,351 $ 365
Adjustments to reconcile net income to cash used in operating activities:    
Depreciation and amortization 210 176
Loss on disposal of equipment and leasehold improvements
Share-based compensation 95 99
Gain on PPP loan forgiveness (952)
Amortization of debt discount 903 134
Changes in assets and liabilities related to operations:    
Trade accounts receivable (464) (1,240)
Inventories (1,281) 97
Prepaid expenses and other assets (114) (295)
Accounts payable 239 (429)
Accrued expenses 489 127
Deferred revenue 30 (271)
Other long-term assets and liabilities (18) (9)
Net cash provided by (used in) operating activities 488 (1,246)
Investing activities:    
Acquisition of equipment and leasehold improvements (508) (276)
Net cash used in investing activities (508) (276)
Financing activities:    
Principal payments on finance leases (93) (116)
Proceeds from line of credit, bank 500 1,000
Payments to the line of credit, bank (1,000) (1,000)
Proceeds from line of credit, related party 11,975 6,860
Payments to line of credit, related party (11,820) (5,595)
Proceeds from term loan, related party 500
Proceeds from PPP / SBA loan 952
Proceeds from stock option exercises 78
Net cash provided by financing activities 140 2,101
Increase in cash and cash equivalents 120 579
Cash and cash equivalents at beginning of period 957 1,194
Cash and cash equivalents at end of period 1,077 1,773
Supplemental cash flow information:     
Interest paid 106 57
Supplemental non-cash investing and financing activities:    
Accounts payable incurred for the purchase of equipment and leasehold improvements 258 1
Conversion of $2M convertible loan, related party 2,000
Interest paid via stock issuance, convertible loan, related party $ 19