Business Segments (Details) (USD $)	3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012 segment	Dec. 31, 2011	Jun. 30, 2012 segment	Sep. 30, 2012 segment	Dec. 31, 2012 segment	Dec. 31, 2011	Dec. 31, 2010
Business Segments
Number of Operating Segments				3	4
Number of reportable segments	3		1		3
Financial information by reportable segment
Sales					$ 49,940,525	$ 37,360,867	$ 31,548,629
Gross profit					27,333,917	23,468,297	19,164,620
Income before income taxes					3,380,122	8,203,980	6,463,370
Capital expenditures					1,865,205	882,984	1,664,209
Depreciation and amortization					1,949,782	616,451	544,341
Interest expense					308,389
Intangible assets, net		909,536			12,381,614	909,536	765,896
Total Assets		39,704,511			57,219,771	39,704,511
Non-recurring inventory fair value adjustment		249,597			269,202	1,000,533
Inventory fair value adjustment
Financial information by reportable segment
Non-recurring inventory fair value adjustment					865,000
Package Testing
Financial information by reportable segment
Sales					19,682,513	4,713,270	3,845,341
Gross profit					8,450,145	2,021,484	1,778,899
Income before income taxes					(1,501,182)	873,092	671,692
Capital expenditures					800,553	61,048	148,012
Depreciation and amortization					1,432,638	47,353	44,331
Interest expense					308,389
Intangible assets, net		86,484			11,314,783	86,484	78,988
Total Assets		7,188,806			28,798,541	7,188,806
Acquisition-related costs					812,000
Package Testing | Inventory fair value adjustment
Financial information by reportable segment
Non-recurring inventory fair value adjustment					865,000
Permeation
Financial information by reportable segment
Sales					21,235,611	25,303,120	21,203,559
Gross profit					13,682,530	17,389,010	14,214,618
Income before income taxes					4,369,845	7,726,113	5,803,499
Capital expenditures					842,957	699,392	1,252,348
Depreciation and amortization					401,577	474,044	420,985
Intangible assets, net		744,465			994,001	744,465	603,543
Total Assets		25,735,107			20,630,686	25,735,107
Industrial Analyzers and Other
Financial information by reportable segment
Sales					9,022,401	7,344,477	6,499,729
Gross profit					5,201,242	4,057,803	3,171,103
Income before income taxes					511,459	(395,225)	(11,821)
Capital expenditures					221,695	122,544	263,849
Depreciation and amortization					115,567	95,054	79,025
Intangible assets, net		78,587			72,830	78,587	83,365
Total Assets		3,552,840			4,471,779	3,552,840
Unallocated - Corporate
Financial information by reportable segment
Total Assets		3,227,758			3,318,765	3,227,758
Intersegment
Financial information by reportable segment
Sales					$ 0	$ 0	$ 0