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Stock-Based Compensation - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Option and restricted stock unit vesting period (up to)     3 years  
Stock based compensation $ 159,799 $ 336,913 $ 827,595 $ 923,072
Compensation cost related to non vested awards not yet recognized $ 1,138,696   $ 1,138,696  
Average remaining expense recognition period     1 year 8 months 12 days