Note 14 - Quarterly Information (Unaudited) - Schedule of Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Total revenue	$ 78,552	$ 77,807	$ 76,378	$ 78,035	$ 82,706	$ 79,577	$ 84,543	$ 86,190	$ 310,772	$ 333,016	$ 305,018
Total costs and expenses	78,201	76,411	80,551	81,297	79,142	77,103	82,817	84,381
Gross margin	45,326	44,090	40,346	41,101	45,686	42,216	44,107	45,123	170,863	177,132	155,593
Operating (loss) income	351	1,396	(4,173)	(3,262)	3,564	2,474	1,726	1,809	(5,688)	9,573	(3,074)
Net (loss) income	$ 410	$ 125	$ (13,250)	$ (3,234)	$ 4,936	$ 2,982	$ 1,113	$ 1,397	(15,949)	10,428	(9,065)
Common Class A [Member]
Net (loss) income									$ (13,692)	$ 8,939	$ (7,762)
Basic net (loss) income per common share (in dollars per share)	$ 0.02	$ 0.01	$ (0.69)	$ (0.17)	$ 0.26	$ 0.16	$ 0.06	$ 0.07	$ (0.82)	$ 0.55	$ (0.49)
Diluted net (loss) income per common share (in dollars per share)	0.02	0.01	(0.69)	(0.17)	0.24	0.14	0.05	0.07	$ (0.82)	$ 0.50	$ (0.49)
Common Class B [Member]
Net (loss) income									$ (2,257)	$ 1,489	$ (1,303)
Basic net (loss) income per common share (in dollars per share)	0.02	0.01	(0.57)	(0.14)	0.22	0.13	0.05	0.06	$ (0.69)	$ 0.46	$ (0.41)
Diluted net (loss) income per common share (in dollars per share)	$ 0.02	$ 0.01	$ (0.57)	$ (0.14)	$ 0.21	$ 0.12	$ 0.05	$ 0.06	$ (0.69)	$ 0.44	$ (0.41)