Equity (Details) - USD ($) $ in Thousands		1 Months Ended	6 Months Ended
	Jan. 05, 2021	Dec. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Equity (Details) [Line Items]
Proceeds from stock options exercised (in Dollars)			$ 686	$ 276
Restricted stock contingent vesting arrangements, description			The restricted shares will vest if: (a) for any fiscal quarter of net2phone 2.0 between November 1, 2020 and October 31, 2023, net2phone 2.0 records subscription revenue that is at least $18 million, and (b) as of October 31, 2023, the valuation of net2phone 2.0 is $100 million or more. The restricted shares will also vest in the event, prior to October 31, 2023, net2phone 2.0 or its assets are sold at an equity valuation and on a cash-free basis of $100 million or more, regardless of whether the revenue threshold was satisfied prior thereto. The restricted shares entitle each grantee to proceeds only on a sale, spin-off, initial public offering, or other monetization of net2phone 2.0 and have protection from dilution for the first $15 million invested in the net2phone 2.0 following the grant.
net2phone 2.0, Inc [Member]
Equity (Details) [Line Items]
Percentage of outstanding common stock		5.00%
Aggregate estimated fair value of equity (in Dollars)			$ 200
Howard S. Jonas [Member] | net2phone 2.0, Inc [Member]
Equity (Details) [Line Items]
Number of restricted shares		50
Stock Repurchases [Member]
Equity (Details) [Line Items]
Shares remained available for repurchase under the stock repurchase program			5,800,000
Common Class B [Member]
Equity (Details) [Line Items]
Aggregate repurchased shares			8,000,000.0
Class B common stock for vested shares	283,838
Proceeds from stock options exercised (in Dollars)			$ 700	$ 300
Class B common stock shares repurchased			81,041	32,551
Common Class B [Member] | Deferred Stock Units [Member]
Equity (Details) [Line Items]
Unvested DSUs outstanding			154,169
Common Class B [Member] | Employees [Member]
Equity (Details) [Line Items]
Class B common stock shares repurchased			109,381	37,348
Aggregate purchase price of shares repurchased (in Dollars)			$ 1,300	$ 300
Vesting for DSUs	19,919
Common Class B [Member] | Stock Repurchases [Member]
Equity (Details) [Line Items]
Class B common stock shares repurchased			463,792
Aggregate purchase price of shares repurchased (in Dollars)			$ 2,800