Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Cash Flows [Abstract]
Income Taxes Paid	$ 458	$ 1,135
Operating activities:
Net income	10,227	3,614
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,401	5,120
Stock-based compensation	7,621	8,694
Deferred income taxes	3,252	830
Changes in operating assets and liabilities:
Accounts receivable	(7,785)	(5,624)
Inventories	(1,593)	(566)
Prepaid expenses and other assets	(2,433)	(3,651)
Accounts payable and other liabilities	(6,193)	1,443
Other	544	442
Net cash provided by operating activities	8,041	10,302
Investing activities:
Purchases of property, plant and equipment	(1,392)	(1,626)
Business acquisition	0	(157)
Net cash used in investing activities	(1,392)	(1,783)
Financing activities:
Net payments on revolving lines of credit	(8,628)	(4,625)
Payments for Repurchase of Common Stock	(1,361)	0
Payment of financing lease principal	(192)	(128)
Proceeds from stock option exercises	16	14
Net cash used in financing activities	(10,165)	(4,739)
Effect of exchange rate changes on cash and cash equivalents	259	(533)
Increase (decrease) in cash, cash equivalents and restricted cash	(3,257)	3,247
Cash, cash equivalents and restricted cash at beginning of period	12,683	5,216
Cash, cash equivalents and restricted cash at end of period	9,426	8,463
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 12,683	$ 5,216