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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Number of additional shares authorized for issuance under an established share-based compensation plan.

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended			6 Months Ended
	Dec. 13, 2018	Dec. 21, 2018	May 31, 2018	Apr. 16, 2018	Jan. 31, 2019	Jan. 31, 2018
Equity (Textual)
Aggregate purchase price					$ 13,272
Common Class B [Member] \| Howard S. Jonas [Member]
Equity (Textual)
Aggregate purchase price		$ 14,800	$ 1,500
Agreed to purchase shares of common stock		2,546,689		2,546,689
Purchase price per share				$ 5.89
Purchase price reduced				$ 200
Stock Repurchase Program [Member] \| Common Class B [Member]
Equity (Textual)
Repurchase of aggregate shares					8,000,000
Aggregate purchase price of shares repurchased					$ 3,900
Class B common stock shares repurchased					729,110
Shares remained available for repurchase under the stock repurchase program					6,900,000
Stock Repurchase Program [Member] \| Common Class B [Member] \| Employee [Member]
Equity (Textual)
Aggregate purchase price of shares repurchased					$ 16,000	$ 100
Class B common stock shares repurchased					2,036	5,170
2015 Stock Option and Incentive Plan [Member] \| Common Class B [Member]
Equity (Textual)
Common stock available for grant of awards	100,000