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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 |  |  |  |  |  |

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