Quarterly report pursuant to Section 13 or 15(d)

The Company and its Significant Accounting Policies - Additional Information (Details)

v3.19.3
The Company and its Significant Accounting Policies - Additional Information (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
May 22, 2019
USD ($)
$ / shares
shares
May 14, 2019
$ / shares
shares
Nov. 02, 2018
Jun. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2019
USD ($)
Employee
shares
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Company And Significant Accounting Policies [Line Items]                
Reverse stock split ratio     0.0667          
Cash and cash equivalents         $ 16,349 $ 16,349   $ 13,049
Net proceeds from issuance of IPO           37,180    
Cash and investment for operating activities           $ 28,803 $ 1,987  
Number of employees reduced related to restructuring activities | Employee           14    
Aggregate restructuring charges         578 $ 578    
Restructuring charges paid         128      
IPO closing date   May 14, 2019            
Unpaid issuance cost and charged to accounts payable or accrued expenses         331 $ 331    
Forecast                
Company And Significant Accounting Policies [Line Items]                
Aggregate restructuring charges       $ 450        
Common Stock                
Company And Significant Accounting Policies [Line Items]                
Shares issued and sold | shares           227,628    
Common Stock | IPO                
Company And Significant Accounting Policies [Line Items]                
Net proceeds from issuance of IPO $ 36,849         $ 36,849    
Shares issued and sold | shares 505,714 3,571,429       4,297,901    
Shares issued and sold, price per share | $ / shares $ 11.00 $ 11.00            
Underwriting discounts and commissions $ 3,139              
Offering expenses paid $ 4,861              
Deferred offering costs         $ 4,861 $ 4,861   $ 63
Common Stock | Over-Allotment                
Company And Significant Accounting Policies [Line Items]                
Shares issued and sold | shares 30,000              
Shares issued and sold, price per share | $ / shares $ 11.00