Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net income	$ 3,596	$ 12,533
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	1,935	1,509
Stock-based compensation	944	(10,700)
Deferred income taxes	(320)	3,196
Changes in operating assets and liabilities, net of acquisition
Accounts receivable	(4,426)	(3,528)
Inventories	1,315	(1,500)
Miscellaneous receivables, prepaid expenses and other assets	(1,148)	(223)
Accounts payable and other liabilities	(3,733)	(8,486)
Other	361	311
Net cash used in operating activities	(1,476)	(6,888)
Investing activities:
Purchases of property, plant and equipment	(849)	(551)
Cash receipt related to acquisition	188	0
Net cash used in investing activities	(661)	(551)
Financing activities:
Net proceeds from revolving line of credit	0	8,189
Repurchase treasury shares	(13)	(1,756)
Payment of financing lease principal	(58)	(67)
Net cash provided by (used in) financing activities	(71)	6,366
Effect of exchange rate changes on cash and cash equivalents	111	(327)
Decrease in cash, cash equivalents and restricted cash	(2,097)	(1,400)
Cash, cash equivalents and restricted cash at beginning of period	29,391	6,297
Cash, cash equivalents and restricted cash at end of period	27,294	4,897
Cash, cash equivalents and restricted cash	27,294	4,897
Supplemental disclosure of cash flow information
Net cash paid for income taxes	378	198
Net cash paid for interest	$ 134	$ 147