Basic and Diluted Net Income per Share (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Basic and Diluted Net Income per Share
Stock split ratio	1.75
Net income	$ 1,487,495us-gaap_NetIncomeLoss	$ 523,367us-gaap_NetIncomeLoss
Weighted-average shares outstanding - Basic (in shares)	10,906,224	7,000,000
Effect of dilutive securities:
Underwriters' warrants	90,612
Preferred stock		1,400,000
Stock options	981,123	459,015
Weighted-average shares outstanding - Diluted (in shares)	11,977,959	8,859,015
Basic net income per share (in dollars per share)	$ 0.14us-gaap_EarningsPerShareBasic	$ 0.07us-gaap_EarningsPerShareBasic
Diluted net income per share (in dollars per share)	$ 0.12us-gaap_EarningsPerShareDiluted	$ 0.06us-gaap_EarningsPerShareDiluted
Anti-dilutive warrants and stock options (in shares)	215,000	586,509

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