Quarterly report pursuant to Section 13 or 15(d)

Equity (Details)

v3.19.2
Equity (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
May 24, 2019
USD ($)
May 24, 2018
shares
May 08, 2018
$ / shares
shares
Apr. 23, 2018
shares
Jun. 30, 2019
$ / shares
shares
Jun. 30, 2019
$ / shares
shares
Sep. 30, 2018
$ / shares
shares
Schedule Of Stockholders Equity [Line Items]              
Preferred stock, shares authorized (in shares)         10,000,000 10,000,000 10,000,000
Preferred stock, par value (in dollars per share) | $ / shares         $ 0.001 $ 0.001 $ 0.001
Preferred stock, shares issued (in shares)         0 0 0
Preferred stock, shares outstanding (in shares)         0 0 0
Common stock, shares outstanding (in shares)     11,250,000       39,464,619
Treasury stock, shares (in shares)         (2,922,952) (2,922,952)  
Non-employee Director              
Schedule Of Stockholders Equity [Line Items]              
Amount of limit of dollar value of equity-based awards | $ $ 750            
Class B Common Stock              
Schedule Of Stockholders Equity [Line Items]              
Stock split, conversion ratio       25.2     25.2
Conversion of stock, shares issued (in shares)     2,250,000 41,817,537      
Common stock, shares authorized (in shares)         100,000,000 100,000,000 100,000,000
Common stock, shares issued (in shares)         22,162,369 22,162,369 42,387,571
Common stock, shares outstanding (in shares)         19,239,417 19,239,417 39,464,619
Treasury stock, shares (in shares)         (2,922,952) (2,922,952) (2,922,592)
Average cost of treasury shares (in dollars per share) | $ / shares           $ 5.34 $ 5.34
Conversion rate         1    
Class B Common Stock | Treasury Stock              
Schedule Of Stockholders Equity [Line Items]              
Conversion of stock, shares issued (in shares)       3,170,034      
Class A Common Stock              
Schedule Of Stockholders Equity [Line Items]              
Number of shares issued in transaction (in shares)   350,000          
Common stock, shares authorized (in shares)         400,000,000 400,000,000 400,000,000
Common stock, shares issued (in shares)         32,442,545 32,442,545 11,950,000
Common stock, shares outstanding (in shares)     9,000,000   32,442,545 32,442,545 11,950,000
Class A Common Stock | Restricted Stock              
Schedule Of Stockholders Equity [Line Items]              
Number of shares awarded (in shares)         267,343 267,343  
Class A Common Stock | IPO              
Schedule Of Stockholders Equity [Line Items]              
Number of shares issued in transaction (in shares)   700,000          
Shares issued, price per share (in dollars per share) | $ / shares     $ 12.00