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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities:      
Net income $ 20,324 $ 12,203 $ 4,671
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 12,912 11,884 11,616
Deferred income taxes 2,473 (3,469) (475)
Share-based compensation 2,923 2,329 1,886
Loss on disposal of assets 80 0 571
Loss from extinguishment of debt 0 1,234 0
Loss (gain) on foreign currency (58) 396 172
Change in operating assets and liabilities:      
Accounts receivable 2,550 (9,000) (8,952)
Inventories 1,808 1,258 (6,769)
Prepaid and other assets (5,825) 928 (565)
Accounts payable (4,916) 5,999 5,346
Accrued and other liabilities 3,551 (4,067) 5,481
Post retirement benefits liability (980) (713) (436)
Net cash provided by operating activities 34,842 18,982 12,546
Cash flows from investing activities:      
Purchase of property, plant and equipment (9,100) (16,588) (11,569)
Proceeds from sale of property, plant and equipment 0 0 154
Net cash used in investing activities (9,100) (16,588) (11,415)
Cash flows from financing activities:      
Gross borrowings on revolving loans 37,098 165,172 49,610
Gross repayment on revolving loans (38,962) (167,732) (45,606)
Proceeds from term loan 0 25,000 0
Payment of principal of term loan (1,288) (25,913) (3,022)
Payment of deferred loan costs 0 (402) (2)
Payments for taxes related to net share settlement of equity awards (2,669) (482) (96)
Net cash provided by (used in) financing activities (5,821) (4,357) 884
Net change in cash and cash equivalents 19,921 (1,963) 2,015
Cash and cash equivalents at beginning of year 4,183 6,146 4,131
Cash and cash equivalents at end of year 24,104 4,183 6,146
Cash paid for:      
Interest 1,234 1,677 1,840
Income taxes 5,250 6,649 5,067
Non-cash investing activities:      
Fixed asset purchases in accounts payable 298 868 329
Non-cash financing activities:      
Deposit used in payment of principal on term loans $ 0 $ 1,200 $ 0