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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2018	Oct. 31, 2017
Allowance for Doubtful Accounts Receivable, Current	$ 160	$ 79
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	225,000,000	125,000,000
Common stock, shares issued	95,672,237	69,492,816
Common stock, shares outstanding	95,672,237	69,492,816
Treasury stock, shares	156,501	88,861
Series B Preferred Stock [Member]
Preferred Stock, Liquidation Preference, Value	$ 64,020	$ 64,020
Series C Preferred Stock [Member]
Preferred Stock, Liquidation Preference, Value	8,992	$ 33,300
Series D Preferred Stock [Member]
Preferred Stock, Liquidation Preference, Value	$ 30,680

X

- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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