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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash Flows from Operating Activities:    
Net income (loss) $ (73) $ (1,297)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Depreciation and amortization 383 536
Stock-based compensation 530 469
Amortization of discount on note payable 22 61
Non-cash interest 0 80
Changes in operating assets and liabilities:    
Contracts and other receivables (899) (931)
Costs and estimated earnings in excess of billings on uncompleted contracts 342 233
Inventories, net (15) (650)
Prepaid expenses and other current assets 156 (927)
Right-of-use assets 849 690
Accounts payable and accrued expenses 14,600 (6,358)
Deferred revenues (377) (1,604)
Operating lease liabilities (806) (754)
Net cash provided by (used in) operating activities 14,712 (10,452)
Cash Flows from Investing Activities:    
Capital expenditures (536) (64)
Net cash provided by (used in) investing activities (536) (64)
Cash Flows from Financing Activities:    
Repurchase of treasury stock (134) (197)
Repayment of long-term borrowings (2,045) (352)
Proceeds from exercise of warrants (367) 0
Proceeds from issuance of stock 41 45
Net cash used in financing activities (1,771) (504)
Net increase (decrease) in cash 12,405 (11,020)
Cash, beginning of period 7,992 19,012
Cash, end of period 20,397 7,992
Supplemental disclosure of cash flow information:    
Cash paid for interest 944 154
Cash paid for taxes 43 62
Non-cash financing activities:    
Operating lease additions $ 0 $ 5,364