Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 5,335,443	$ 5,667,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,333,000	1,890,000
Provision for bad debts - accounts receivable	180,000	211,000
Share-based compensation expense	983,000	964,000
Deferred income tax provision (benefit)	(69,000)	(881,000)
Loss on sales of property, plant and equipment		12,000
Accretion of acquisition-related contingent liability	81,000	65,000
Changes in assets and liabilities, net of acquisition of business:
Accounts receivable - trade	(2,181,000)	(2,079,000)
Accounts receivable - other	1,125,000	892,000
Inventories	653,000	(2,493,000)
Prepaid expenses and other current assets	(1,648,000)	(1,419,000)
Other assets	(353,000)	(41,000)
Accounts payable	2,238,000	4,386,000
Other current liabilities	(1,350,000)	(2,233,000)
Long-term pension liability	259,000	567,000
Other long-term liabilities	40,000	40,000
Net cash provided by operating activities	7,626,000	5,548,000
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to property, plant and equipment	(5,527,000)	(2,099,000)
Acquisition of business, net of acquired cash	(15,252,000)
Net cash used in investing activities	(20,779,000)	(2,099,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from long-term debt	90,514,000	25,040,000
Repayment of long-term debt	(71,138,000)	(26,638,000)
Payment of cash dividends	(2,270,000)	(2,006,000)
Payment of contingent liability	(1,800,000)
Proceeds received on exercise of stock options	781,000	1,383,000
Excess tax benefit from exercise of stock options and SARS	683,000	588,000
Net cash provided by (used in) financing activities	16,770,000	(1,633,000)
Effect of currency exchange rates on cash	82,000
Net increase in cash and cash equivalents	3,699,000	1,816,000
Cash and cash equivalents balance, beginning of year	1,036,000	4,586,000
Cash and cash equivalents balance, end of period	$ 4,735,000	$ 6,402,000