Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Details)

v3.10.0.1
Stockholders' Equity - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Dec. 12, 2017
Class Of Stock [Line Items]      
Common stock, shares authorized 100,000,000 100,000,000  
Common stock, shares issued 4,169,199 4,152,789  
Common stock, shares outstanding 4,169,199 4,152,789  
Preferred stock, shares authorized 1,000,000 1,000,000  
Preferred stock, shares issued 0 0  
Preferred stock, shares outstanding 0 0  
Rights      
Class Of Stock [Line Items]      
Number of shares of common stock each holder receive     0.10
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 | 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 4,169,199 4,152,789  
Common stock, shares outstanding 4,169,199 4,152,789  
Shares subject to possible redemption 14,292,807 14,309,217  
Number of shares of common stock each holder receive 0.10    
Common Stock | Independent Directors      
Class Of Stock [Line Items]      
Common stock issued in consideration of future services, shares 60,000 60,000  
Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, shares authorized 1,000,000    
Preferred stock, shares issued 0 0  
Preferred stock, shares outstanding 0 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 11,154,942  
Warrants | Minimum      
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