Note 4 - Revenue Recognition - Disaggregated Revenues by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2026	Apr. 30, 2025
Revenues	$ 315,713	$ 301,985	$ 958,981	$ 914,901
National Retail Solutions [Member]
Revenues	38,000	31,145	114,421	94,483
Fintech [Member]
Revenues	45,004	38,619	128,918	112,527
Fintech [Member] \| BOSS Money [Member]
Revenues	39,665	34,411	114,224	101,608
Fintech [Member] \| Product and Service, Other [Member]
Revenues	5,339	4,208	14,694	10,919
Net2phone [Member]
Revenues	24,368	21,990	71,717	65,099
Traditional Communications [Member]
Revenues	208,341	210,231	643,925	642,792
Traditional Communications [Member] \| Product and Service, Other [Member]
Revenues	5,483	5,834	17,123	17,876
Traditional Communications [Member] \| IDT Digital Payments [Member]
Revenues	103,855	102,620	315,294	309,333
Traditional Communications [Member] \| IDT Global [Member]
Revenues	55,610	50,044	175,393	153,701
Traditional Communications [Member] \| BOSS Revolution [Member]
Revenues	$ 43,393	$ 51,733	$ 136,115	$ 161,882