Consolidated Statements of Stockholders’ Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Translation Adjustment [Member]	Total
Balance at Dec. 31, 2010	$ 134,823	$ 61,817,558	$ 25,785,541	$ (2,547,776)	$ 85,190,146
Balance (in Shares) at Dec. 31, 2010	13,482,384
Issuance of common stock for employee equity awards	1,482	158,988			160,470
Issuance of common stock for employee equity awards (in Shares)	148,223
Tax benefit related to stock based compensation		274,190			274,190
Stock based compensation expense		1,190,697			1,190,697
Net income			8,466,680		8,466,680
Other comprehensive income (loss)				(519,405)	(519,405)
Balance at Dec. 31, 2011	136,305	63,441,433	34,252,221	(3,067,181)	94,762,778
Balance (in Shares) at Dec. 31, 2011	13,630,607
Issuance of common stock for employee equity awards	2,354	386,321			388,675
Issuance of common stock for employee equity awards (in Shares)	235,453
Tax benefit related to stock based compensation		452,471			452,471
Stock based compensation expense		1,151,199			1,151,199
Net income			11,757,460		11,757,460
Other comprehensive income (loss)				412,551	412,551
Balance at Dec. 31, 2012	138,659	65,431,424	46,009,681	(2,654,630)	108,925,134
Balance (in Shares) at Dec. 31, 2012	13,866,060
Issuance of common stock for employee equity awards	4,234	3,049,707			3,053,941
Issuance of common stock for employee equity awards (in Shares)	423,248
Tax benefit related to stock based compensation		856,830			856,830
Stock based compensation expense		1,268,070			1,268,070
Net income			20,574,521		20,574,521
Other comprehensive income (loss)				955,535	955,535
Balance at Dec. 31, 2013	$ 142,893	$ 70,606,031	$ 66,584,202	$ (1,699,095)	$ 135,634,031
Balance (in Shares) at Dec. 31, 2013	14,289,308