Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 3,506	$ 3,832
Adjustments to reconcile net income to net cash used by operating activities:
Depreciation	811	717
Amortization	575	455
Stock compensation expense	237	184
Changes in operating assets and liabilities:
Accounts receivable	(11,840)	(13,898)
Inventories	2,347	(2,432)
Prepaid expenses and other assets	(107)	(329)
Accounts payable	141	4,856
Other accrued liabilities	(329)	993
Total adjustments	(8,165)	(9,454)
Net cash used by operating activities	(4,659)	(5,622)
Cash flows from investing activities:
Purchase of property, plant, and equipment	(1,600)	(752)
Purchase of patents and trademarks		(29)
Acquisition of businesses	(7,233)	(6,971)
Net cash used by investing activities	(8,833)	(7,752)
Cash flows from financing activities:
Net borrowings of long-term debt	14,010	14,908
Cash settlement of stock options	(732)	(681)
Proceeds from issuance of common stock	628	390
Distributions to stockholders	(666)	(668)
Purchase of treasury stock		(907)
Net cash provided by financing activities	13,240	13,042
Effect of exchange rate changes on cash and cash equivalents	15	(7)
Net decrease in cash and cash equivalents	(237)	(339)
Cash and cash equivalents at beginning of period	5,911	2,426
Cash and cash equivalents at end of period	5,674	2,087
Supplemental cash flow information:
Cash paid for income taxes	175	531
Cash paid for interest	$ 550	$ 372