Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Total	Common Stock	Additional Paid In Capital	Foreign Currency Translation Adjustment	Retained Earnings	Treasury Stock	Non Controlling Interest
Beginning balance at Dec. 31, 2013	$ 18,272,076	$ 87,499	$ 8,805,460	$ (266,456)	$ 9,482,128	$ (65,029)	$ 228,474
Beginning balance, shares at Dec. 31, 2013		8,749,888
Net income (loss)	2,030,928				2,048,077		(17,149)
Dividends declared	(440,016)				(440,016)
Options exercised	63,250	$ 1,150	49,600			12,500
Options exercised, shares		115,000
Stock based compensation - grants	329,914	$ 493	276,892			$ 52,529
Stock based compensation - grants, shares		49,386
Acquisition of joint venture partner's interest in OdorStar	(211,325)						$ (211,325)
Foreign currency translation adjustment	(12,707)			(12,707)
Ending balance at Dec. 31, 2014	20,032,120	$ 89,142	9,131,952	(279,163)	11,090,189
Ending balance, shares at Dec. 31, 2014		8,914,274
Net income (loss)	$ 460,694				460,694
Options exercised		$ 79	(79)
Options exercised, shares		7,844
Stock based compensation - grants	$ 156,053	$ 613	155,440
Stock based compensation - grants, shares		61,256
Foreign currency translation adjustment	(5,279)			(5,279)
Ending balance at Dec. 31, 2015	$ 20,643,588	$ 89,834	$ 9,287,313	$ (284,442)	$ 11,550,883
Ending balance, shares at Dec. 31, 2015		8,983,374