Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses - Additional Information (Detail)

v3.19.1
Accrued Expenses - Additional Information (Detail) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Other Accrued Liabilities, Current $ 296,227 $ 795,974
TDG Acquisition Company LLC [Member]    
Other Accrued Liabilities, Current $ 250,000 $ 750,000