Note 2 - Revenue Recognition - Disaggregation of Revenue by Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues	$ 67,386	$ 75,436	$ 146,698	$ 171,640
Revenues, percentage	100.00%	100.00%	100.00%	100.00%
Revenues, variance	$ (8,050)		$ (24,942)
Revenues, variance, percentage	(10.70%)		(14.50%)
Internet [Member]
Revenues	$ 55,961	$ 62,697	$ 122,408	$ 144,208
Revenues, percentage	83.00%	83.10%	83.40%	84.00%
Revenues, variance	$ (6,736)		$ (21,800)
Revenues, variance, percentage	(10.70%)		(15.10%)
Contact Center [Member]
Revenues	$ 11,425	$ 12,739	$ 24,290	$ 27,432
Revenues, percentage	17.00%	16.90%	16.60%	16.00%
Revenues, variance	$ (1,314)		$ (3,142)
Revenues, variance, percentage	(10.30%)		(11.50%)
Reorder Customer [Member]
Revenues	$ 62,016	$ 67,761	$ 132,953	$ 148,186
Revenues, percentage	92.00%	89.80%	90.60%	86.30%
Revenues, variance	$ (5,745)		$ (15,233)
Revenues, variance, percentage	(8.50%)		(10.30%)
New Order Customer [Member]
Revenues	$ 5,370	$ 7,675	$ 13,745	$ 23,454
Revenues, percentage	8.00%	10.20%	9.40%	13.70%
Revenues, variance	$ (2,305)		$ (9,709)
Revenues, variance, percentage	(30.00%)		(41.40%)