Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
The Company and its Significant Accounting Policies - Additional Information (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
May 22, 2019
USD ($)
$ / shares
shares
May 14, 2019
$ / shares
shares
Nov. 02, 2018
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
Company And Significant Accounting Policies [Line Items]            
Reverse stock split ratio     0.0667      
IPO closing date   May 14, 2019        
Net proceeds from issuance of IPO         $ 38,399  
Unpaid issuance cost and charged to accounts payable or accrued expenses       $ 1,550 $ 1,550  
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]            
Shares issued and sold | shares 505,714 3,571,429   4,077,143 4,297,901  
Shares issued and sold, price per share | $ / shares $ 11.00 $ 11.00        
Net proceeds from issuance of IPO $ 36,849          
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