Note 2 - Revenue Recognition - Disaggregation of Revenue by Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Revenues	$ 79,988	$ 87,390
Revenues, percentage	100.00%	100.00%
Revenues, variance	$ (7,402)
Revenues, variance, percentage	(8.50%)
Internet [Member]
Revenues	$ 67,023	$ 74,320
Revenues, percentage	83.80%	85.00%
Revenues, variance	$ (7,297)
Revenues, variance, percentage	(9.80%)
Contact Center [Member]
Revenues	$ 12,965	$ 13,070
Revenues, percentage	16.20%	15.00%
Revenues, variance	$ (105)
Revenues, variance, percentage	(0.80%)
Reorder Customer [Member]
Revenues	$ 67,742	$ 71,501
Revenues, percentage	84.70%	81.80%
Revenues, variance	$ (3,759)
Revenues, variance, percentage	(5.30%)
New Order Customer [Member]
Revenues	$ 12,246	$ 15,889
Revenues, percentage	15.30%	18.20%
Revenues, variance	$ (3,643)
Revenues, variance, percentage	(22.90%)