Note 16 - Quarterly Information (Unaudited) - Schedule of Quarterly Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Total revenue	$ 82,977	$ 76,660	$ 74,081	$ 74,147	$ 78,552	$ 77,807	$ 76,378	$ 78,035	$ 307,865	$ 310,772	$ 333,016
Total costs and expenses	75,726	72,593	71,768	75,080	78,201	76,411	80,551	81,297
Gross margin	51,508	46,005	43,258	41,722	45,326	44,090	40,346	41,101	182,493	170,863	177,132
Operating (loss) income	7,251	4,067	2,313	(933)	351	1,396	(4,173)	(3,262)	12,698	(5,688)	9,573
Net income (loss)	$ 8,202	$ 3,213	$ 60	$ (410)	$ 410	$ 125	$ (13,250)	$ (3,234)	11,065	(15,949)	10,428
Common Class A [Member]
Net income (loss)									$ 9,541	$ (13,692)	$ 8,939
Basic net (loss) income per common share (in dollars per share)	$ 0.41	$ 0.16	$ 0.00	$ (0.02)	$ 0.02	$ 0.01	$ (0.69)	$ (0.17)	$ 0.55	$ (0.82)	$ 0.55
Diluted net (loss) income per common share (in dollars per share)	0.39	0.16	0.00	(0.02)	0.02	0.01	(0.69)	(0.17)	$ 0.53	$ (0.82)	$ 0.50
Common Class B [Member]
Net income (loss)									$ 1,524	$ (2,257)	$ 1,489
Basic net (loss) income per common share (in dollars per share)	0.34	0.13	0.00	(0.02)	0.02	0.01	(0.57)	(0.14)	$ 0.46	$ (0.69)	$ 0.46
Diluted net (loss) income per common share (in dollars per share)	$ 0.33	$ 0.13	$ 0.00	$ (0.02)	$ 0.02	$ 0.01	$ (0.57)	$ (0.14)	$ 0.45	$ (0.69)	$ 0.44