SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Tables)

v3.20.2

SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Tables)	12 Months Ended
	Jul. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS	Year ended July 31,   Description   Balance at Beginning of Year     Charged (credited) to costs and expenses     Charged to other accounts     Deductions     Balance at end of Year                                       2020   Allowance for doubtful accounts receivable   $ 166     $ 28                      —     $ 194                                                 2019   Allowance for doubtful accounts receivable     145       42             $ 21 (1)     166                                                 2018   Allowance for doubtful accounts receivable     147       —               2 (1)     145                                                 2020   Deferred tax valuation allowance     23,527       6,550               —       30,077                                                 2019   Deferred tax valuation allowance     24,471       (944 )             —       23,527                                                 2018   Deferred tax valuation allowance   $ 32,581     $ (8,110 )             —     $ 24,471   (1) Write-off of uncollectible accounts receivable.