Note 10 - Revenue, Deferred Revenue and Accounts Receivable - Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2026	Aug. 31, 2025	Aug. 31, 2026	Aug. 31, 2025
Net revenue	$ 15,296	$ 28,179	$ 60,733	$ 82,874
Net revenue	15,296	28,179	60,733	82,874
Product [Member]
Net revenue	15,296	27,865	60,787	81,749
Net revenue	15,296	27,865	60,787	81,749
Royalty [Member]
Net revenue	0	314	(54)	1,125
Net revenue	0	314	(54)	1,125
Wholesale (dealer/distributors) [Member]
Net revenue	4,200	10,483	19,241	26,585
Net revenue	4,200	10,483	19,241	26,585
Wholesale (dealer/distributors) [Member] \| Retail Stores [Member]
Net revenue	483	735	1,813	1,813
Net revenue	483	735	1,813	1,813
Wholesale (dealer/distributors) [Member] \| International [Member]
Net revenue	535	2,546	2,455	6,803
Net revenue	535	2,546	2,455	6,803
Wholesale (dealer/distributors) [Member] \| Byrna Dedicated Dealers [Member]
Net revenue	3,541	7,871	16,534	19,631
Net revenue	3,541	7,871	16,534	19,631
Wholesale (dealer/distributors) [Member] \| Law Enforcement, Schools and Pvt Security [Member]
Net revenue	124	66	252	151
Net revenue	124	66	252	151
E-commerce [Member]
Net revenue	11,096	17,382	41,546	55,164
Net revenue	11,096	17,382	41,546	55,164
E-commerce [Member] \| International [Member]
Net revenue	588	318	1,634	1,054
Net revenue	588	318	1,634	1,054
E-commerce [Member] \| Web [Member]
Net revenue	10,025	16,329	38,099	52,297
Net revenue	10,025	16,329	38,099	52,297
Royalties [Member]
Net revenue	0	314	(54)	1,125
Net revenue	0	314	(54)	1,125
United States and Mexico [Member]
Net revenue	14,245	25,236	57,115	74,391
Net revenue	14,245	25,236	57,115	74,391
SOUTH AFRICA
Net revenue	0	998	1	1,456
Net revenue	0	998	1	1,456
Europe/South America/Asia [Member]
Net revenue	381	1,477	1,581	5,656
Net revenue	381	1,477	1,581	5,656
CANADA
Net revenue	670	468	2,036	1,371
Net revenue	$ 670	$ 468	$ 2,036	$ 1,371