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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 2,184 $ (5,107)
Adjustments to reconcile net cash used in operating activities:    
Depreciation and amortization expense 3,167 3,095
Deferred income taxes (5) (9)
Change in fair value of interest rate swap agreements 0 2
Share-based compensation 409 580
Allowance for doubtful accounts 16 30
Common stock issued under defined contribution 401(k) plan 648 613
Loss on disposal of assets 48 3
Changes in operating assets and liabilities:    
Accounts receivable (11,794) (7,389)
AMP credit receivable (6,729) 0
Employee retention credit receivable 0 497
Contract assets (273) (2,194)
Inventories (4,293) (1,552)
Prepaid expenses and other current assets 147 596
Accounts payable 1,776 9,698
Accrued liabilities 1,367 656
Customer deposits (4,190) (7,789)
Other non-current assets and liabilities 75 6
Net cash used in operating activities (17,447) (8,264)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property and equipment (3,977) (1,697)
Proceeds from disposals of property and equipment 15 0
Net cash used in investing activities (3,962) (1,697)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from line of credit, net 11,991 10,687
Proceeds from long-term debt 618 125
Payments on long-term debt (607) (107)
Principal payments on finance leases (1,113) (1,003)
Shares withheld for taxes in connection with issuance of restricted stock (117) (544)
Net cash provided by financing activities 10,772 9,158
NET DECREASE IN CASH (10,637) (803)
CASH beginning of the period 12,732 852
CASH end of the period $ 2,095 $ 49