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Consolidated Statements of Operations [Parenthetical] - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Amortization and depreciation $ 1,183,143 $ 1,462,505 $ 1,462,995
Share-based compensation expense $ 299,337 $ 324,281 $ 227,035