Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Future Annual Minimum Payments under all Non-Cancelable Operating Leases (Detail)

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Commitments and Contingencies - Future Annual Minimum Payments under all Non-Cancelable Operating Leases (Detail)
Dec. 31, 2018
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2019 $ 171,804
2020 8,784
Total $ 180,588