Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Details)

v3.20.2
Stockholders' Equity - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2019
Class Of Stock [Line Items]      
Treasury stock purchased, shares 41,699 2,819  
Payment for treasury stock $ 343 $ 19  
Series E Convertible Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, outstanding 47,840   77,840
Repurchased shares of preferred stock 30,000    
Aggregate purchase price of convertible preferred stock $ 3