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Equity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 14, 2022 | Dec. 05, 2022 | Jan. 05, 2022 | Jan. 31, 2023 | Jan. 31, 2022 | Jan. 31, 2023 | Jan. 31, 2022 | Nov. 30, 2022 | Jul. 31, 2022
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from exercise of stock options |  |  |  |  |  | $ 172 |  |  |
Share based compensation |  |  |  | $ 1,286 | $ 310 | $ 1,858 | $ 595 |  |
Shares remained available for repurchase under stock repurchase program |  |  |  | 5,000,000.0 |  | 5,000,000.0 |  |  |
Deferred Stock Units [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Estimated fair value of DSUs on date of grant |  |  |  | $ 5,100 |  | $ 5,100 |  |  |
Weighted average grant date fair value per DSU |  |  |  |  |  | $ 27.20 |  |  |
Unrecognized compensation cost related to non-vested DSUs |  |  |  | $ 4,200 |  | $ 4,200 |  |  |
Common Class B [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share |  |  |  | $ 0.01 |  | $ 0.01 |  |  | $ 0.01
Common Class B [Member] | Deferred Stock Units [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Deferred stock units, description |  |  |  |  |  | On November 30, 2022, the Company adopted an equity incentive program (under its 2015 Stock Option and Incentive Plan) in the form of grants of DSUs that, upon vesting, will entitle the grantees to receive shares of the Company’s Class B common stock. On December 5, 2022, the Company granted 187,975 DSUs to certain of its executive officers and other employees. Subject to continued full time employment or other service to the Company, the DSUs are scheduled to vest in three equal amounts on each of May 17, 2023, February 21, 2024, and February 25, 2025. The number of shares that will be issuable on each vesting date will vary between 50% to 200% of the number of DSUs that vest on that vesting date, depending on the market price for the underlying Class B common stock on the vesting date relative to the price approved by the Compensation Committee of the Company’s Board of Directors of $25.45 per share (which was based on the market price at the time of the grant). In addition, the grantee will have the right to elect a later vesting date no later than April 14, 2023 for the May 17, 2023 vesting date, and no later than January 19, 2024 for the February 21, 2024 vesting date. A grantee will have the option to elect a later vesting date for one-half or all of the shares scheduled to vest on the then upcoming vesting date and any DSUs that do not vest based on the grantee’s election, will be eligible to vest on the subsequent scheduled vesting date. The Company estimated that the fair value of the DSUs on the date of grant was $5.1 million, which is being recognized on a graded vesting basis over the requisite service periods ending in February 2025. The Company used a risk neutral Monte Carlo simulation method in its valuation of the DSUs, which simulated the range of possible future values of the Company’s Class B common stock over the life of the DSUs. |  |  |
Number of deferred stock units granted |  | 187,975 |  |  |  |  |  |  |
Share based compensation arrangement by share based payment award, equity instruments other than options, vested in period |  |  | 301,296 |  |  |  |  |  |
Common Class B [Member] | 2015 Stock Option and Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock additionally authorized | 50,000 |  |  |  |  |  |  |  |
Proceeds from exercise of stock options |  |  |  |  |  | $ 200 |  |  |
Number of exercised of stock options shares |  |  |  |  |  | 12,500 | 0 |  |
Class B Common Stock [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Aggregate repurchased shares |  |  |  | 8,000,000.0 |  | 8,000,000.0 |  |  |
Class B common stock shares repurchased |  |  |  |  |  | 203,436 |  |  |
Aggregate purchase price of shares repurchased |  |  |  |  |  | $ 5,000 |  |  |
Executive Officer [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Performance bonus paid in cash stock |  |  |  |  |  | $ 1,200 |  |  |
Executive Officer [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Issuance of shares |  |  |  |  |  | 24,543 |  |  |
Issuance of shares, value |  |  |  |  |  | $ 600 |  |  |
Employee [Member] | Common Class B [Member] | 2015 Stock Option and Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock granted |  |  |  |  |  | 15,000 |  |  |
Share based compensation |  |  |  |  |  | $ 400 |  |  |
Employees [Member] | Class B Common Stock [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Class B common stock shares repurchased |  |  |  |  |  | 13,403 | 200,438 |  |
Aggregate purchase price of shares repurchased |  |  |  |  |  | $ 300 | $ 9,000 |  |
Board Of Directors [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share |  |  |  |  |  |  |  | $ 25.45 |

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