Quarterly report pursuant to Section 13 or 15(d)

Offering - Additional Information (Details)

v3.19.2
Offering - Additional Information (Details) - $ / shares
Jan. 09, 2018
Dec. 12, 2017
Jun. 30, 2019
Jun. 05, 2019
Sep. 30, 2018
Class Of Stock [Line Items]          
Units sold in offering   12,500,000      
Sale of stock price per unit   $ 10.00 $ 10.00   $ 10.00
Number of shares of common stock per unit   1      
Common stock, par value   $ 0.0001 $ 0.0001 $ 0.0001 $ 0.0001
Second Closing of Offering          
Class Of Stock [Line Items]          
Units sold in offering 1,875,000        
Sale of stock price per unit $ 10.00        
Rights          
Class Of Stock [Line Items]          
Number of shares of common stock each holder receive   0.10      
Warrants          
Class Of Stock [Line Items]          
Number of shares of common stock each holder receive   0.75 4    
Exercise price of warrants   $ 11.50 $ 11.50