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Stockholders' Equity - Narrative (Details) - Common Stock - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Sep. 23, 2019
Sep. 30, 2019
Class of Stock [Line Items]    
Stock issued upon conversion of redeemable convertible preferred shares (in shares)   7,816,643
IPO    
Class of Stock [Line Items]    
Initial public offering (in shares) 4,140,000  
Shares issued in public offering, price per share (in dollars per share) $ 14.00  
Sale of Stock, Consideration Received on Transaction $ 50.4  
Estimated offering expenses for aggregate expenses $ 7.5  
Stock issued upon conversion of redeemable convertible preferred shares (in shares) 7,816,643  
Over-Allotment Option    
Class of Stock [Line Items]    
Initial public offering (in shares) 540,000