Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Schedule Of Significant Accounting Policies [Line Items]        
Cash   $ 597,268 $ 469,707 $ 597,268
Working capital deficit     5,304,524  
Offering costs charged to stockholders' equity upon completion of offering     $ 3,252,059  
Number of shares of common stock underlying restricted stock award subject to forfeiture     60,000 60,000
Unrecognized tax benefits   0 $ 0 $ 0
Amount accrued for payment of interest and penalties   $ 0 $ 0 $ 0
U.S. Statutory tax rate 35.00% 21.00% 21.00% 24.30%
Offering and Private Placement | Warrants        
Schedule Of Significant Accounting Policies [Line Items]        
Warrants sold to purchase common stock     $ 11,154,942  
Offering and Private Placement | Rights        
Schedule Of Significant Accounting Policies [Line Items]        
Rights sold for conversion into common stock     1,487,326 1,487,326