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Commitments and Contingencies - Estimated Future Minimum Rental Payments (Details) - USD ($)
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Estimated future minimum rental payments on the leases    
2017 $ 252,232  
2018 437,900  
2019 182,251  
2020 165,116  
2021 86,638  
TOTAL 1,124,137  
Total rent expense $ 250,000 $ 229,000