Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities
Net earnings	$ 22,295	$ 23,645	$ 14,394
Adjustments to reconcile net earnings to net cash provided by operating activities
Impairment of goodwill and indefinite-lived intangibles	0	2,820	0
Depreciation and amortization	11,795	10,631	10,626
(Gain) loss on disposal of property and equipment	34	(120)	(195)
Reclassification of foreign currency translation adjustment related to disposal of subsidiary	(827)	0	0
Share-based compensation expense	1,336	1,799	1,499
Inventory write-offs for obsolescence	2,588	1,876	2,065
Deferred income taxes	(2,556)	1,011	1,890
Other	358	819	893
Net changes in operating assets and liabilities, net of acquisition:
Accounts receivable	11,369	(7,757)	(10,537)
Inventories	(619)	(5,095)	(4,307)
Prepaid expenses and other current assets	(5,087)	588	(3,260)
Trade accounts payable	(2,273)	(819)	2,009
Other current liabilities	(7,481)	5,981	7,652
Net cash provided by operating activities	30,932	35,379	22,729
Investing activities
Capital expenditures	(11,196)	(14,521)	(6,960)
Proceeds from sale of property and equipment	615	132	541
Purchase of business	(40,481)	0	0
Net cash used in investing activities	(51,062)	(14,389)	(6,419)
Financing activities
Principal payments on long-term debt	(4,618)	(5,603)	(2,628)
Proceeds from revolving facility	22,000	22,000	41,000
Payments on revolving facility	0	(19,000)	(41,000)
Distributions to noncontrolling interests	(52)	(109)	(75)
Payments of employee taxes on certain share-based arrangements	(854)	(801)	(303)
Net cash provided by (used in) financing activities	16,476	(3,513)	(3,006)
Effect of exchange rate changes on cash and cash equivalents	405	(1,610)	2,536
(Decrease) increase in cash and cash equivalents	(3,249)	15,867	15,840
Cash and cash equivalents at beginning of year	90,159	74,292	58,452
Cash and cash equivalents at end of year	86,910	90,159	74,292
Supplemental disclosure of investing transactions:
Capital expenditures purchased	(10,529)	(13,239)	(10,092)
Supplemental disclosure of non-cash financing transactions:
Conversion of exchangeable notes to common stock	0	$ (2,794)	$ (1,303)
Capital expenditures accrued but not yet paid	$ 1,183