Note 4 - Revenue Recognition - Disaggregated Revenues by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2024
Revenues	$ 1,297,960	$ 1,231,495	$ 1,205,778
National Retail Solutions [Member]
Revenues	159,399	128,793	103,141
Fintech [Member]
Revenues	175,994	154,610	120,721
Fintech [Member] \| BOSS Money [Member]
Revenues	156,670	139,828	108,332
Fintech [Member] \| Product and Service, Other [Member]
Revenues	19,324	14,782	12,389
Net2phone [Member]
Revenues	96,639	87,875	82,325
Traditional Communications [Member]
Revenues	865,928	860,217	899,591
Traditional Communications [Member] \| Product and Service, Other [Member]
Revenues	24,949	23,133	27,827
Traditional Communications [Member] \| IDT Digital Payments [Member]
Revenues	429,160	416,312	407,430
Traditional Communications [Member] \| BOSS Revolution [Member]
Revenues	180,300	211,163	263,215
Traditional Communications [Member] \| IDT Global [Member]
Revenues	$ 231,519	$ 209,609	$ 201,119