Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Class B [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
BALANCE at Jul. 31, 2022	$ 170,637		$ 33	$ 277	$ 296,005	$ (101,565)	$ (11,305)	$ (15,830)	$ 3,022
Repurchases of Class B common stock through repurchase program	(7,506)					(7,506)
Stock issued to certain executive officers for bonus payments	615				615
Exercise of stock options	172				172
Restricted Class B common stock purchased from employees	(339)					(339)
Stock-based compensation	3,537			1	3,536
Distributions to noncontrolling interests	(293)								(293)
Other comprehensive income (loss)	(3,170)						(3,170)
Net income	35,350							32,515	2,835
BALANCE at Apr. 30, 2023	199,003		33	278	300,328	(109,410)	(14,475)	16,685	5,564
BALANCE at Jan. 31, 2023	193,014		33	278	298,649	(106,906)	(13,711)	9,795	4,876
Repurchases of Class B common stock through repurchase program	(2,500)					(2,500)
Restricted Class B common stock purchased from employees	(4)					(4)
Stock-based compensation	1,679				1,679
Distributions to noncontrolling interests	(106)								(106)
Other comprehensive income (loss)	(764)						(764)
Net income	7,684							6,890	794
BALANCE at Apr. 30, 2023	199,003		33	278	300,328	(109,410)	(14,475)	16,685	5,564
BALANCE at Jul. 31, 2023	199,996		33	279	301,408	(115,461)	(17,192)	24,662	6,267
Dividends declared ($0.05 per share)	(1,269)							(1,269)
Repurchases of Class B common stock through repurchase program	(5,675)					(5,675)
Restricted net2phone common stock purchased from employees	(3,558)				(3,611)				53
Stock issued to certain executive officers for bonus payments	1,495				1,495
Business acquisition holdback payment	100	$ 100			100
Exercise of stock options	172				172
Restricted Class B common stock purchased from employees	(1,532)					(1,532)
Stock-based compensation	3,411			1	3,410
Distributions to noncontrolling interests	(62)								(62)
Other comprehensive income (loss)	(51)						(51)
Net income	30,253							27,635	2,618
BALANCE at Apr. 30, 2024	223,280		33	282	303,055	(122,668)	(17,243)	51,028	8,793
Exchange of National Retail Solutions shares for Class B common stock				2	81				(83)
BALANCE at Jan. 31, 2024	219,887		33	281	300,631	(118,631)	(17,276)	46,746	8,103
Dividends declared ($0.05 per share)	(1,269)							(1,269)
Repurchases of Class B common stock through repurchase program	(2,520)					(2,520)
Restricted net2phone common stock purchased from employees	(1,517)					(1,517)
Stock issued to certain executive officers for bonus payments	1,495				1,495
Business acquisition holdback payment	100				100
Stock-based compensation	830			1	829
Distributions to noncontrolling interests	(3)								(3)
Other comprehensive income (loss)	33						33
Net income	6,244							5,551	693
BALANCE at Apr. 30, 2024	$ 223,280		$ 33	$ 282	$ 303,055	$ (122,668)	$ (17,243)	$ 51,028	$ 8,793