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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net (loss) income $ (9,730) $ 2,847
Adjustments to reconcile net cash provided by (used in) provided by operating activities:    
Depreciation and amortization expense 6,060 6,336
Paycheck Protection Program loan forgiveness 0 (9,151)
Deferred income taxes (13) (2)
Change in fair value of interest rate swap agreements (27) 23
Stock-based compensation 944 1,541
Allowance for doubtful accounts (30) (426)
Common stock issued under defined contribution 401(k) plan 1,244 1,193
Loss (gain) on disposal of assets 3 (33)
Changes in operating assets and liabilities:    
Accounts receivable (3,186) 1,961
Employee retention credit receivable 497 (497)
Contract assets (820) 1,117
Inventories (10,885) (6,653)
Prepaid expenses and other current assets (629) 133
Accounts payable 9,926 (1,736)
Accrued liabilities 686 (2,676)
Customer deposits 22,468 (6,737)
Other non-current assets and liabilities 135 (66)
Net cash provided by (used in) provided by operating activities 16,643 (12,826)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property and equipment (3,098) (1,707)
Proceeds from disposals of property and equipment 0 33
Net cash used in investing activities (3,098) (1,674)
CASH FLOWS FROM FINANCING ACTIVITIES:    
(Payments on) proceeds from line of credit, net (6,350) 5,105
Payments for deferred financing costs (470) 0
Proceeds from long-term debt 8,113 817
Payments on long-term debt (863) (161)
Principal payments on finance leases (1,776) (1,672)
Shares withheld for taxes in connection with issuance of restricted stock (549) (1,423)
Proceeds from sale of common stock, net 230 9,314
Net cash (used in) provided by financing activities (1,665) 11,980
NET INCREASE (DECREASE) IN CASH 11,880 (2,520)
CASH beginning of the period 852 3,372
CASH end of the period 12,732 852
Supplemental cash flow information:    
Interest paid 1,638 741
Income taxes paid 23 102
Non-cash investing and financing activities:    
Equipment additions via finance lease 3,882 2,757
Non-cash purchases of property and equipment $ 134 $ 18