XML 17 R43.htm IDEA: XBRL DOCUMENT v3.20.1
Business - Additional Information (Details) - USD ($)
 1 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Line Items]      
Entity information, date to change former legal or registered name   Jun. 21, 2018  
Net proceeds from issuance of common stock after deducting underwriting discounts and commissions and offering costs     $ 78,334,457
Common Stock      
Organization Consolidation And Presentation Of Financial Statements [Line Items]      
Common stock, shares issued     5,980,000
IPO      
Organization Consolidation And Presentation Of Financial Statements [Line Items]      
Net proceeds from issuance of common stock after deducting underwriting discounts and commissions and offering costs $ 77,500,000    
Underwriting discounts and commissions and offering costs $ 12,200,000    
IPO | Common Stock      
Organization Consolidation And Presentation Of Financial Statements [Line Items]      
Common stock, shares issued 5,980,000    
Common stock, issue price per share $ 15.00