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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Preferred Stock
Treasury Stock
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Paid-in Capital
Series A Preferred Stock
Paid-in Capital
Beginning balance at Sep. 30, 2017 $ 125,776 $ 37,209 $ 3 $ 0 $ (97,388) $ (30,832) $ 37,209 $ 185,140 $ 68,853
Beginning balance (in shares) at Sep. 30, 2017     31,872 700 6,865        
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) (32,682)         (32,682)      
Issuance of common stock under employee plans (in shares)     379            
Shares withheld for payroll taxes (223)             (223)  
Shares withheld for payroll taxes (in shares)     (82)            
Stock-based compensation 1,815             1,815  
Preferred stock cash dividends declared (5,250)         (5,250)      
Ending balance at Sep. 30, 2018 $ 126,645   $ 3 $ 0 $ (97,388) (31,555)   186,732 68,853
Ending balance (in shares) at Sep. 30, 2018     32,169 700 6,865        
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201602Member                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) $ (7,868)         (7,868)      
Issuance of common stock under employee plans (in shares)     465            
Shares withheld for payroll taxes (629)             (629)  
Shares withheld for payroll taxes (in shares)     (135)            
Stock-based compensation 1,390             1,390  
Preferred stock cash dividends declared (5,250)         (5,250)      
Ending balance at Sep. 30, 2019 114,288 $ 8,958 $ 3 $ 0 $ (97,388) (44,673) $ 8,958 187,493 68,853
Ending balance (in shares) at Sep. 30, 2019     32,499 700 6,865        
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 8,008         8,008      
Issuance of common stock under employee plans (in shares)     328            
Shares withheld for payroll taxes (698)             (698)  
Shares withheld for payroll taxes (in shares)     (97)            
Stock-based compensation 2,077             2,077  
Shares issued for equity offering 49,153       $ 97,023     (47,870)  
Shares issued for equity offering (in shares)         6,783        
Preferred stock cash dividends declared (5,264)         (5,264)      
Ending balance at Sep. 30, 2020 176,522   $ 3 $ 0 $ (365) (32,971)   141,002 68,853
Ending balance (in shares) at Sep. 30, 2020     32,730 700 82        
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net income (loss) 6,450                
Ending balance at Sep. 30, 2020 $ 176,522   $ 3 $ 0 $ (365) $ (32,971)   $ 141,002 $ 68,853
Ending balance (in shares) at Sep. 30, 2020     32,730 700 82