Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Details)

v3.10.0.1
Stockholders' Equity - Additional Information (Details) - USD ($)
12 Months Ended
Sep. 30, 2018
Dec. 12, 2017
Oct. 08, 2017
Class Of Stock [Line Items]      
Common stock, shares authorized 100,000,000    
Common stock, shares issued 4,152,789    
Common stock, shares outstanding 4,152,789    
Preferred stock, shares authorized 1,000,000    
Preferred stock, shares issued 0    
Preferred stock, shares outstanding 0    
Rights      
Class Of Stock [Line Items]      
Number of shares of common stock each holder receive   0.10  
Warrants or rights outstanding 12,129,822    
Number of fractional shares issued upon conversion of rights 0    
Additional consideration required to be paid by holder of right to receive additional shares $ 0    
Funds and distributions to be received by rights holders upon liquidation of funds held in trust account 0    
Contractual penalties for failure to deliver securities to the rights holders $ 0    
Minimum [Member] | Rights      
Class Of Stock [Line Items]      
Period allotted to complete the business combination 15 months    
Maximum | Rights      
Class Of Stock [Line Items]      
Period allotted to complete the business combination 18 months    
Common Stock      
Class Of Stock [Line Items]      
Common stock, shares authorized 100,000,000    
Common stock, voting rights per share one    
Common stock, shares issued 4,152,789    
Common stock, shares outstanding 4,152,789   0
Shares subject to possible redemption 14,309,217    
Number of shares of common stock each holder receive 0.10    
Common Stock | Board of Directors      
Class Of Stock [Line Items]      
Common stock issued in consideration of future services, shares 60,000    
Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, shares authorized 1,000,000    
Preferred stock, shares issued 0    
Preferred stock, shares outstanding 0    
Warrants      
Class Of Stock [Line Items]      
Exercise price of warrants $ 11.50 $ 11.50  
Number of shares of common stock each holder receive 4 0.75  
Warrant agreement date Dec. 12, 2017    
Number of fractional shares issued upon exercise of warrants 0    
Period after business combination when warrants become exercisable 30 days    
Period after offering when warrants become exercisable 12 months    
Warrants exercisable expiration period after completion of business combination 5 years    
Net cash settlement value of warrants $ 0    
Redemption price per warrant $ 0.01    
Minimum period of prior written notice of redemption of warrants 30 days    
Minimum price per share required for redemption of warrants $ 18.00    
Warrants redemption covenant, threshold trading days 20 days    
Warrants redemption covenant, threshold consecutive trading days 30 days    
Warrants or rights outstanding 11,154,942    
Warrants | Minimum [Member]      
Class Of Stock [Line Items]      
Period allotted to complete the business combination 15 months    
Warrants | Maximum      
Class Of Stock [Line Items]      
Period allotted to complete the business combination 18 months