Business Acquisition (Details) (USD $)	3 Months Ended						1 Months Ended		1 Months Ended		1 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2012 Dansensor	Dec. 31, 2012 Dansensor	Apr. 02, 2012 Dansensor	Dec. 31, 2011 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
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	14,447,178	9,183,331
Net income	866,601	820,673
Basic Earnings per Share (in dollars per share)			$ 0.17
Supplemental pro-forma combined results of operations:
Net Sales			14,056,968
Net Income			905,262
Basic Earnings per Share (in dollars per share)			$ 0.17
Acquisition related costs				$ 812,000		$ 36,000