Consolidated Statements of Changes in Convertible Preferred Stock and Stockholders' Equity - USD ($)	Convertible preferred stock	Common Stock	Treasury stock	Additional Paid In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Balance at Dec. 31, 2012	$ 22,438	$ 536,589		$ 99,199,149	$ 37,925	$ (81,913,244)	$ 17,882,857
Balance (in shares) at Dec. 31, 2012	2,243,750	53,658,857
Increase (Decrease) in Stockholders' Equity
Restricted stock issued		$ 8,607		(23,918)			(15,311)
Restricted stock issued (in shares)		860,739
Warrants exercised		$ 2,131		(2,131)
Warrants exercised (in shares)		213,123
Options exercised		$ 3,048		586,083			589,131
Options exercised (in shares)		304,769
Stock-based compensation expense				1,279,502			1,279,502
Cumulative translation adjustment					97,306		97,306
Net income						22,006	22,006
Balance at Dec. 31, 2013	$ 22,438	$ 550,375		101,038,685	135,231	(81,891,238)	19,855,491
Balance (in shares) at Dec. 31, 2013	2,243,750	55,037,488
Increase (Decrease) in Stockholders' Equity
Treasury Stock, Value			$ (822,603)				(822,603)
Treasury stock (in shares)			503,100
Restricted stock issued		$ (3)		(5,159)			(5,162)
Restricted stock issued (in shares)		(243)
Warrants exercised		$ 797		(797)
Warrants exercised (in shares)		79,677
Options exercised		$ 5,641		928,391			934,032
Options exercised (in shares)		564,077
Stock-based compensation expense				1,316,133			1,316,133
Cumulative translation adjustment					(309,005)		(309,005)
Net income						3,160,385	3,160,385
Balance at Dec. 31, 2014	$ 22,438	$ 556,810	$ (822,603)	103,277,253	(173,774)	(78,730,853)	24,129,271
Balance (in shares) at Dec. 31, 2014	2,243,750	55,680,999	503,100
Increase (Decrease) in Stockholders' Equity
Treasury Stock, Value			$ (7,060,409)				(7,060,409)
Treasury stock (in shares)			3,102,786
Restricted stock issued		$ (2,727)		(30,144)			(32,871)
Restricted stock issued (in shares)		(272,724)
Options exercised		$ 7,831		1,649,760			1,657,591
Options exercised (in shares)		783,114
Stock-based compensation expense				1,844,157			1,844,157
Cumulative translation adjustment					(336,671)		(336,671)
Net income						10,362,448	10,362,448
Balance at Dec. 31, 2015	$ 22,438	$ 561,914	$ (7,883,012)	$ 106,741,026	$ (510,445)	$ (68,368,405)	$ 30,563,516
Balance (in shares) at Dec. 31, 2015	2,243,750	56,191,389	3,605,886