Equity (Details Narrative) - USD ($)					1 Months Ended			3 Months Ended		9 Months Ended
		Feb. 21, 2024	Dec. 21, 2023	Dec. 13, 2023	May 31, 2024	Mar. 31, 2024	Jan. 31, 2024	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Class of Stock [Line Items]
Cash dividend										$ 1,269,000
Dividends declared per share								$ 0.05		$ 0.05
Received cash from exercise of stock options										$ 172,000	172,000
Share Repurchase Program, Remaining Authorized, Number of Shares								4,500,000		4,500,000
Share-Based Payment Arrangement, Noncash Expense										$ 5,375,000	3,537,000
Exchange of outstanding shares percentage							1.25%
Exchange of NRS shares for Class B common stock
Selling, General and Administrative Expenses [Member]
Class of Stock [Line Items]
Share-Based Payment Arrangement, Noncash Expense	[1]							$ 2,027,000	$ 1,579,000	5,025,000	3,096,000
net2phone 2.0, Inc. [Member]
Class of Stock [Line Items]
Restricted common stock with holding employees outstanding shares percentage							4.50%
Amended And Restated Employment Agreement [Member] | Selling, General and Administrative Expenses [Member]
Class of Stock [Line Items]
Share-Based Payment Arrangement, Noncash Expense								1,500,000		3,000,000.0
Amended And Restated Employment Agreement [Member] | Deferred Stock Units [Member]
Class of Stock [Line Items]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount								200,000		200,000
Amended And Restated Employment Agreement [Member] | Contingent Bonus [Member]
Class of Stock [Line Items]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount								900,000		900,000
Class A And Class B Common Stock[Member]
Class of Stock [Line Items]
Cash dividend per share						$ 0.05
Cash dividend								$ 1,300,000		$ 1,300,000
Class A And Class B Common Stock[Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Dividends declared per share					$ 0.05
Dividend paid date					Jun. 17, 2024
Dividend record date					Jun. 10, 2024
Common Class B [Member]
Class of Stock [Line Items]
Number of shares during period							192,433
Exchange of outstanding shares percentage							1.25%
Exchange of NRS shares for Class B common stock							$ 100,000
Common Class B [Member] | net2phone 2.0, Inc. [Member]
Class of Stock [Line Items]
Vested shares							500,000
Shares granted							50,000
Offsetting income tax withholding liability							$ 3,600,000
Increase in non controlling interests							53,000
Decrease in additional paid in capital							$ 3,610,000
Common Class B [Member] | Deferred Stock Units [Member]
Class of Stock [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Description										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 base 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 initial grants under this program).
Vested shares		53,706
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number		147,540
Common Class B [Member] | 2024 Equity Incentive Plan [Member]
Class of Stock [Line Items]
Number of shares, grant				250,000
Common Class B [Member] | 2015 Stock Option and Incentive Plan [Member]
Class of Stock [Line Items]
Additional number of shares authorized				250,000
Received cash from exercise of stock options										$ 200,000	$ 200,000
Shares issued										12,500	12,500
Common Class B [Member] | Amended And Restated Employment Agreement [Member] | net2phone 2.0, Inc. [Member]
Class of Stock [Line Items]
Shares granted			50,000
Common Class B [Member] | Amended And Restated Employment Agreement [Member] | Bill Pereira [Member]
Class of Stock [Line Items]
Number of shares during period										39,155
Stock Issued During Period, Value, New Issues										$ 1,500,000
Common Class B [Member] | Amended And Restated Employment Agreement [Member] | Bill Pereira [Member] | Deferred Stock Units [Member]
Class of Stock [Line Items]
Shares granted			23,500
Class B Common Stock [Member]
Class of Stock [Line Items]
Share Repurchase Program, Authorized, Number of Shares								8,000,000.0		8,000,000.0
Treasury Stock, Shares, Acquired										204,107	280,130
Treasury Stock, Value, Acquired, Cost Method										$ 5,700,000	$ 7,500,000
Class B Common Stock [Member] | Employees [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired										41,994	13,547
Treasury Stock, Value, Acquired, Cost Method										$ 1,500,000	$ 300,000

[1] Stock-based compensation included in: Technology and development expense & Selling, general and administrative expense