Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities:
Net income	$ 5,305	$ 4,353
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation	1,097	970
Amortization	693	584
Stock compensation expense	306	442
Changes in operating assets and liabilities:
Accounts receivable	(5,145)	(4,205)
Inventories	(2,134)	(1,392)
Prepaid expenses and other current assets	219	(226)
Accounts payable	21	(371)
Other accrued liabilities	1,223	(844)
Total adjustments	(3,720)	(5,042)
Net cash provided (used) by operating activities	1,585	(689)
Investing Activities:
Purchase of property, plant, and equipment	(1,320)	(1,352)
Purchase of patents and trademarks	(29)	(52)
Acquisition of certain assets of Diamond Machining Technology	(6,971)
Proceeds from the sales of property, plant and equipment		5
Net cash used by investing activities	(8,320)	(1,399)
Financing Activities:
Borrowing of long-term debt	13,793	4,404
Cash settlement of stock options	(1,700)
Proceeds from issuance of common stock	390	1,139
Distributions to stockholders	(1,000)	(895)
Purchase of treasury stock	(907)	(162)
Net cash provided by financing activities	10,576	4,486
Effect of exchange rate changes on cash	5	(63)
Net change in cash and cash equivalents	3,846	2,335
Cash and cash equivalents at beginning of period	2,426	2,286
Cash and cash equivalents at end of period	$ 6,272	$ 4,621