Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Additional Information (Details)

v3.19.3.a.u2
Stockholders' Equity - Additional Information (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Sep. 30, 2019
USD ($)
$ / shares
shares
Sep. 30, 2018
USD ($)
$ / shares
shares
Jan. 07, 2014
shares
Class Of Stock [Line Items]      
Accrued dividends | $ $ 1 $ 1  
Treasury stock purchased, shares 119,238 46,632  
Payment for treasury stock | $ $ 888 $ 550  
Treasury stock, shares 262,177 142,939  
Treasury stock, common shares, cost | $ $ 2,438 $ 1,550  
2014 Omnibus Equity Incentive Plan      
Class Of Stock [Line Items]      
Common stock reserved for issuance     300,000
Common Stock      
Class Of Stock [Line Items]      
Shares issued during period 0 0  
Series B Convertible Preferred Stock      
Class Of Stock [Line Items]      
Dividends declared per share by board of directors | $ / shares $ 1.00    
Stockholders' equity, conversion ratio 5    
Shares issued during period 0 0  
Preferred stock, issued 214,244 214,244  
Preferred stock, outstanding 214,244 214,244  
Series E Convertible Preferred Stock      
Class Of Stock [Line Items]      
Preferred stock, issued 77,840 77,840  
Preferred stock, outstanding 77,840 77,840  
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 | $ $ 1 $ 1