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Long-term Debt and Capital Lease Obligations - Schedule of Future Minimum Payments under Capital Lease Obligation (Detail) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Debt Disclosure [Abstract]    
2019 $ 114,852  
2020 114,852  
2021 114,852  
2022 114,852  
2023 22,216  
Less interest (61,066)  
Less current portion (90,167) $ (57,236)
Capital lease obligation net $ 330,391