Business Segments (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012 segment	Sep. 30, 2013 segment	Sep. 30, 2012 segment
Business Segments
Number of Operating Segments		3	4
Number of reportable segments			3	1
Financial information by reportable segment
Trade Revenue	$ 14,189,873	$ 12,306,151	$ 42,325,066	$ 34,688,885
Segment Operating Income	1,914,968	765,482	4,079,536	1,764,135
Permeation
Financial information by reportable segment
Trade Revenue	5,596,470	4,680,997	15,550,031	15,753,250
Segment Operating Income	1,325,605	1,089,981	2,630,193	3,491,806
Package Testing
Financial information by reportable segment
Trade Revenue	6,328,402	5,533,628	18,976,020	12,745,486
Segment Operating Income	674,797	(638,286)	1,183,960	(1,923,758)
Industrial Analyzers and Other
Financial information by reportable segment
Trade Revenue	2,265,001	2,091,526	7,799,015	6,190,149
Segment Operating Income	(85,434)	313,787	265,383	196,087
Intersegment
Financial information by reportable segment
Trade Revenue	$ 0	$ 0	$ 0	$ 0