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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Operating activities    
Net income $ 8,986 $ 3,596
Adjustments to reconcile net income to net cash used in operating activities:    
Depreciation and amortization 2,089 1,935
Stock-based compensation (8,623) 944
Deferred income taxes 1,565 (320)
Reserve for obsolete and excess inventory 438 1,224
Changes in operating assets and liabilities    
Accounts receivable (7,915) (4,426)
Inventories (3,665) 91
Miscellaneous receivables, prepaid expenses and other assets 96 (1,148)
Accounts payable and other liabilities 6,886 (3,733)
Other (68) 361
Net cash used in operating activities (211) (1,476)
Investing activities    
Purchases of property, plant and equipment (2,057) (849)
Business acquisition, net of acquired cash 0 188
Net cash used in investing activities (2,057) (661)
Financing activities    
Net proceeds on revolving lines of credit 3,666 0
Shares repurchased held in treasury (33) (13)
Payment of financing lease principal (43) (58)
Net cash provided by (used in) financing activities 3,590 (71)
Effect of exchange rate changes on cash and cash equivalents 33 111
Increase (decrease) in cash, cash equivalents and restricted cash 1,355 (2,097)
Cash, cash equivalents and restricted cash at beginning of period 4,379 29,391
Cash, cash equivalents and restricted cash at end of period 5,734 27,294
Cash and cash equivalents 5,534 26,293
Restricted cash 200 1,001
Total cash, cash equivalents and restricted cash 5,734 27,294
Supplemental disclosure of cash flow information    
Net cash paid for income taxes 680 378
Net cash paid for interest 98 134
Additions of property, plant and equipment included in accounts payable $ 149 $ 70