Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
The Company and its Significant Accounting Policies - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jan. 01, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Company And Significant Accounting Policies [Line Items]          
Entity incorporation date   Aug. 05, 1999      
Cash and cash equivalents   $ 12,362   $ 11,298  
Net loss from operations   9,964 $ 5,124    
Increase in cash balance   $ 1,064      
IPO closing date   May 14, 2019      
Deferred revenue as contract liabilities   $ 306   $ 291  
ASC 606          
Company And Significant Accounting Policies [Line Items]          
Cumulative effect adjustment net of associated tax effect to reduce accumulated deficit $ 3,115        
Cumulative effect adjustment associated tax effect to reduce accumulated deficit 215        
Deferred revenue as contract liabilities $ 770        
Common Stock | IPO          
Company And Significant Accounting Policies [Line Items]          
Deferred offering costs     $ 1,709   $ 63