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 (loss) income	Accumulated deficit	Total
Balance at Dec. 31, 2011	$ 22,438	$ 517,644		$ 95,706,552	$ (40,729)	$ (77,460,939)	$ 18,744,966
Balance (in shares) at Dec. 31, 2011	2,243,750	51,764,405
Increase (Decrease) in Stockholders' Equity
Stock issued		4,884		1,596,862			1,601,746
Stock issued (in shares)		488,337
Warrants exercised		9,176		(9,176)
Warrants exercised (in shares)		917,602
Options exercised		4,885		769,864			774,749
Options exercised (in shares)		488,513
Stock-based compensation expense				1,135,047			1,135,047
Cumulative translation adjustment					78,654		78,654
Net income						(4,452,305)	(4,452,305)
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, Shares, Acquired			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