Consolidated Statements of Stockholders’ Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances, at Dec. 31, 2011	$ 11,358,959	$ 40,994,013	$ (21,933,985)		$ 30,418,987us-gaap_StockholdersEquity
Balances, (in Shares) at Dec. 31, 2011	13,375,196
Exercise of stock options	713,746	(295,638)			418,108
Exercise of stock options (in Shares)	191,585				191,585
Repurchase and retirement of shares	(1,988,288)	(7,127,545)			(9,115,833)
Repurchase and retirement of shares (in Shares)	(2,485,360)
Cancellation of restricted stock (in Shares)	(81)
Stock-based compensation		360,699			360,699
Net income			4,424,142		4,424,142us-gaap_NetIncomeLoss
Other comprehensive income (loss)				44,104	44,104
Balances, at Dec. 31, 2012	10,084,417	33,931,529	(17,509,843)	44,104	26,550,207us-gaap_StockholdersEquity
Balances, (in Shares) at Dec. 31, 2012	11,081,340
Exercise of stock options	2,626,352	(1,134,178)			1,492,174
Exercise of stock options (in Shares)	890,034				890,034
Repurchase and retirement of shares	(851,502)	(5,686,114)			(6,537,616)
Repurchase and retirement of shares (in Shares)	(1,064,299)
Cancellation of restricted stock (in Shares)	(12)
Income tax effect related to stock options exercised		1,090,171			1,090,171
Stock-based compensation		430,903			430,903
Net income			4,180,464		4,180,464us-gaap_NetIncomeLoss
Other comprehensive income (loss)				(289,085)	(289,085)
Balances, at Dec. 31, 2013	11,859,267	28,632,311	(13,329,379)	(244,981)	26,917,218us-gaap_StockholdersEquity
Balances, (in Shares) at Dec. 31, 2013	10,907,063
Exercise of stock options	2,365,825	(886,900)			1,478,925
Exercise of stock options (in Shares)	502,061				502,061
Repurchase and retirement of shares	(95,033)	(1,086,825)			(1,181,858)
Repurchase and retirement of shares (in Shares)	(79,392)
Income tax effect related to stock options exercised		1,888,734			1,888,734
Stock-based compensation		542,738			542,738
Net income			6,374,096		6,374,096us-gaap_NetIncomeLoss
Other comprehensive income (loss)				(377,460)	(377,460)
Balances, at Dec. 31, 2014	$ 14,130,059	$ 29,090,058	$ (6,955,283)	$ (622,441)	$ 35,642,393us-gaap_StockholdersEquity
Balances, (in Shares) at Dec. 31, 2014	11,329,732

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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Number of shares issued which are neither cancelled nor held in the treasury.

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