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Consolidated Statements of Changes in Equity - USD ($)
$ in Thousands
Total
Series D Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Series D Preferred Stock [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Treasury Stock [Member]
Deferred Compensation [Member]
Balance at at Oct. 31, 2016 $ 114,396   $ 0 $ 1,004,570   $ (889,630) $ (544) $ (179) $ 179
Balance at (in shares) at Oct. 31, 2016     2,931,202            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Sale of common stock, warrants and public offering 13,884     13,884          
Sale of common stock, warrants and public offering, (in shares)     1,000,000            
Exercise of prepaid warrants and warrants 12,722   $ 1 12,721          
Exercise of prepaid warrants and warrants, (in shares)     1,138,411            
Sale of common stock, net of fees 12,431     12,431          
Sale of common stock, net of fees (in shares)     603,786            
Common stock issued, non-employee compensation 129     129          
Common stock issued, non-employee compensation, (in shares)     7,167            
Share based compensation 4,585     4,585          
Taxes paid upon vesting of restricted stock awards, net of stock issued under benefit plans (84)     (84)          
Taxes paid upon vesting of restricted stock awards, net of stock issued under benefit plans, (in shares)     (107,056)            
Series C convertible preferred stock conversions 167     167          
Series C convertible preferred stock conversions, (in shares)     9,058            
Preferred dividends — Series B (3,200)     (3,200)          
Effect of foreign currency translation 129           129    
Adjustment for deferred compensation                 101
Adjustment for deferred compensation, (in shares)     (5,611)            
Adjustment for deferred compensation               (101)  
Net loss (53,903)         (53,903)      
Balance at at Oct. 31, 2017 101,256   $ 1 1,045,203   (943,533) (415) (280) 280
Balance at (in shares) at Oct. 31, 2017     5,791,068            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Sale of common stock, net of fees 7,129     7,129          
Sale of common stock, net of fees (in shares)     476,265            
Exercise of warrants 3,326     3,326          
Exercise of warrants, (in shares)     216,309            
Common stock issued, non-employee compensation 282     282          
Common stock issued, non-employee compensation, (in shares)     13,226            
Share based compensation 3,238     3,238          
Taxes paid upon vesting of restricted stock awards, net of stock issued under benefit plans (660)     (660)          
Taxes paid upon vesting of restricted stock awards, net of stock issued under benefit plans, (in shares)     (14,913)            
Series C convertible preferred stock conversions 20,220     20,220          
Series C convertible preferred stock conversions, (in shares)     1,496,368            
Preferred dividends — Series B (3,200)     (3,200)          
Series D Preferred stock redemption accretion   $ (2,075)     $ (2,075)        
Effect of foreign currency translation 12           12    
Adjustment for deferred compensation                 83
Adjustment for deferred compensation, (in shares)     (5,637)            
Adjustment for deferred compensation               (83)  
Net loss (47,334)         (47,334)      
Balance at at Oct. 31, 2018 $ 82,194   $ 1 1,073,463   (990,867) (403) (363) 363
Balance at (in shares) at Oct. 31, 2018 7,972,686   7,972,686            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Sale of common stock, net of fees $ 43,666   $ 12 43,654          
Sale of common stock, net of fees (in shares)     119,128,677            
Common stock issued, non-employee compensation 102     102          
Common stock issued, non-employee compensation, (in shares)     29,454            
Share based compensation 2,804     2,804          
Taxes paid upon vesting of restricted stock awards, net of stock issued under benefit plans (200)     (200)          
Taxes paid upon vesting of restricted stock awards, net of stock issued under benefit plans, (in shares)     (52,607)            
Series A warrant exchange, (in shares)     500,000            
Series C convertible preferred stock conversions 15,489     15,489          
Series C convertible preferred stock conversions, (in shares)     3,914,218            
Series C convertible preferred stock adjustment for beneficial conversion feature 6,586     6,586          
Series C convertible stock redemption value adjustments (14,597)     (14,597)          
Preferred dividends — Series B (3,231)     (3,231)          
Series D convertible preferred stock conversions 31,183   $ 6 31,177          
Series D convertible preferred stock conversions, (in shares)     62,040,496            
Series D Preferred stock redemption accretion   $ (3,793)     $ (3,793)        
Impact of the adoption of Topic 606 (6,654)         (6,654)      
Effect of foreign currency translation (244)           (244)    
Adjustment for deferred compensation                 103
Adjustment for deferred compensation, (in shares)     (29,454)            
Adjustment for deferred compensation               (103)  
Net loss (77,568)         (77,568)      
Balance at at Oct. 31, 2019 $ 75,737   $ 19 $ 1,151,454   $ (1,075,089) $ (647) $ (466) $ 466
Balance at (in shares) at Oct. 31, 2019 193,608,684   193,608,684