Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Details)

v3.20.4
Stockholders' Equity - Additional Information (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Sep. 30, 2020
USD ($)
$ / shares
shares
Sep. 30, 2019
USD ($)
$ / shares
shares
Jan. 07, 2014
shares
Class Of Stock [Line Items]      
Accrued dividends | $ $ 1 $ 1  
Common stock, shares issued 1,589,101 1,826,009  
Common stock, shares outstanding 1,589,101 1,826,009  
Treasury stock purchased, shares 236,908 119,238  
Payment for treasury stock | $ $ 1,660 $ 888  
2014 Omnibus Equity Incentive Plan      
Class Of Stock [Line Items]      
Common stock reserved for issuance     300,000
Series B Convertible Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, issued 214,244 214,244  
Preferred stock, outstanding 214,244 214,244  
Dividends declared per share by board of directors | $ / shares $ 1.00    
Stockholders' equity, conversion ratio 5    
Series E Convertible Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, issued 47,840 77,840  
Preferred stock, outstanding 47,840 77,840  
Repurchased shares of preferred stock 30,000    
Aggregate purchase price of convertible preferred stock | $ $ 3    
Preferred stock, dividend rate 5.00%    
Preferred stock, liquidation preference per share | $ / shares $ 0.30 $ 0.30  
Preferred stock conversion ratio 0.005    
Preferred stock, conversion price per share | $ / shares $ 85.50    
Accrued dividends | $ $ 2 $ 1