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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net earnings $ 19,959 $ 16,699
Adjustments to reconcile net earnings to net cash provided by operating activities -    
Depreciation 3,712 3,956
Amortization 318 349
Bad debt expense 311 621
Deferred income taxes 643 2,187
Net foreign currency transaction losses (gains) 459 (146)
Share-based compensation expense 1,513 1,622
Pension contribution (3,000) (4,000)
Pension expense 696 995
Impairment of long-lived assets 356 0
Increase in cash surrender value of life insurance (528) (517)
Changes in operating assets and liabilities -    
Accounts receivable (2,409) 637
Inventories (12,387) 9,634
Prepaid expenses and other assets 531 486
Accounts payable 3,898 (2,813)
Accrued liabilities and other (2,617) 3,720
Accrued income taxes 2,427 124
Excess tax benefits from stock-based compensation (830) (37)
Net cash provided by operating activities 13,052 33,517
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of marketable securities (7,949) (15,597)
Proceeds from maturities of marketable securities 11,338 17,565
Life insurance premiums paid (155) (155)
Purchases of property, plant and equipment (1,410) (1,578)
Net cash provided by investing activities 1,824 235
CASH FLOWS FROM FINANCING ACTIVITIES:    
Cash dividends paid (9,213) (8,877)
Cash dividends paid to noncontrolling interest of subsidiary (88) (204)
Payment to acquire noncontrolling interest of subsidiary (3,740) 0
Shares purchased and retired (11,414) (15,190)
Net proceeds from stock options exercised 4,403 4,284
Taxes paid related to the net share settlement of equity awards (699) (154)
Proceeds from bank borrowings 60,340 31,570
Repayments of bank borrowings (54,500) (35,838)
Net cash used for financing activities (14,911) (24,409)
Effect of exchange rate changes on cash and cash equivalents (445) 400
Net (decrease) increase in cash and cash equivalents (480) 9,743
CASH AND CASH EQUIVALENTS at beginning of year 23,453 13,710
CASH AND CASH EQUIVALENTS at end of year 22,973 23,453
SUPPLEMENTAL CASH FLOW INFORMATION:    
Income taxes paid, net of refunds 3,669 4,901
Interest paid $ 45 $ 15