Business Segments (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012 segment	Jun. 30, 2013 segment	Jun. 30, 2012
Business Segments
Number of Operating Segments		3	4
Number of reportable segments		1	3
Financial information by reportable segment
Trade Revenue	$ 13,688,015	$ 13,199,404	$ 28,135,193	$ 22,382,735
Segment Operating Income	909,220	(299,218)	2,164,568	998,654
Permeation
Financial information by reportable segment
Trade Revenue	5,075,899	5,114,442	9,953,560	11,072,251
Segment Operating Income	840,252	1,148,533	1,304,587	2,401,826
Package Testing
Financial information by reportable segment
Trade Revenue	6,035,986	5,982,122	12,647,618	7,211,860
Segment Operating Income	(20,692)	(1,433,921)	509,164	(1,285,472)
Industrial Analyzers and Other
Financial information by reportable segment
Trade Revenue	2,576,130	2,102,840	5,534,015	4,098,624
Segment Operating Income	89,660	(13,830)	350,817	(117,700)
Intersegment
Financial information by reportable segment
Trade Revenue	$ 0	$ 0	$ 0	$ 0