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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Cash Flows from Operating Activities:    
Net Income (loss) $ 463 $ (1,155)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation and amortization 179 273
Non-cash interest 0 59
Amortization of debt discount 22 38
Stock-based compensation 213 245
Changes in operating assets and liabilities:    
Contract and other receivables 230 375
Costs and estimated earnings in excess of billings on uncompleted contracts (2,224) (738)
Inventories, net 616 35
Prepaid expenses and other assets 32 (391)
Right-of-use assets 346 318
Accounts payable and accrued expenses (1,266) (11,919)
Deferred revenues 2,200 1,955
Operating lease liabilities (342) (347)
Net cash provided by (used in) operating activities 469 (11,252)
Cash Flows from Investing Activities:    
Capital expenditures (122) (52)
Net cash used in investing activities (122) (52)
Cash Flows from Financing Activities:    
Proceeds from issuance of equity 31 20
Repayment of long-term debt (1) (352)
Repurchase of stock (3) (103)
Net cash provided by (used in) financing activities 27 (435)
Net increase (decrease) in cash and cash equivalents 374 (11,739)
Cash and cash equivalents at beginning of period 7,992 19,012
Cash and cash equivalents at end of period 8,366 7,273
Supplemental disclosure of cash flow information:    
Cash paid for interest 277 117
Cash paid for taxes $ 33 $ 51