Business Acquisition (Details) (USD $)	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			1 Months Ended		1 Months Ended		1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Dansensor	Dec. 31, 2012 Dansensor	Dec. 31, 2012 Dansensor	Dec. 31, 2011 Dansensor	Apr. 02, 2012 Dansensor	Apr. 30, 2012 Dansensor Trademark/tradename	Apr. 02, 2012 Dansensor Trademark/tradename	Apr. 30, 2012 Dansensor Developed technology	Apr. 02, 2012 Dansensor Developed technology	Apr. 30, 2012 Dansensor Customer relationships	Apr. 02, 2012 Dansensor Customer relationships
Business Acquisition
Cash paid at closing								$ 13,600,000
Allocation of purchase price:
Cash and cash equivalents								832,758
Trade accounts receivable, net								3,348,142
Other receivables								470,135
Inventories								2,943,855
Property, plant and equipment								1,376,296
Other assets								117,464
Intangible assets								12,210,330
Identifiable assets acquired								21,298,980
Accounts payable								744,714
Other accrued expenses								2,533,742
Deferred income tax-current								509,744
Deferred income tax-long-term								3,069,017
Liabilities assumed								6,857,217
Net identifiable assets acquired								14,441,763
Goodwill								5,639,837
Purchase Price	20,081,600							20,081,600
Purchase price net of cash acquired								19,200,000
Intangible assets
Amount								12,210,330		3,819,090		7,512,670		878,570
Weighted Average Life									20 years		9 years		9 years
Goodwill recognized expected to be deductible for income tax purposes								0
Actual consolidated net sales and net income
Net Sales	49,940,525	37,360,867	31,548,629		12,971,493
Net income	2,001,974	5,450,918	4,518,384		(1,177,354)
Supplemental pro-forma combined results of operations:
Net Sales				15,134,705		54,814,162	57,605,949
Net Income (Loss)				1,353,285		2,086,563	5,519,353
Basic Earnings per Share (in dollars per share)				$ 0.25		$ 0.38	$ 1.03
Acquisition related costs since inception of the acquisition					848,000	848,000
Acquisition related costs recorded as selling, general and administrative expenses						$ 812,000