Note 2 - Revenue Recognition - Disaggregation of Revenue by Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 60,068	$ 60,110	$ 218,854	$ 206,478
Revenues	100.00%	100.00%	100.00%	100.00%
Revenues	$ (42)		$ 12,376
Revenues	(0.10%)		6.00%
Internet [Member]
Revenues	$ 50,701	$ 50,358	$ 185,320	$ 173,175
Revenues	84.40%	83.80%	84.70%	83.90%
Revenues	$ 343		$ 12,145
Revenues	0.70%		7.00%
Contact Center [Member]
Revenues	$ 9,367	$ 9,752	$ 33,534	$ 33,303
Revenues	15.60%	16.20%	15.30%	16.10%
Revenues	$ (385)		$ 231
Revenues	(3.90%)		0.70%
Reorder Customer [Member]
Revenues	$ 53,289	$ 50,949	$ 185,866	$ 170,487
Revenues	88.70%	84.80%	84.90%	82.60%
Revenues	$ 2,340		$ 15,379
Revenues	4.60%		9.00%
New Order Customer [Member]
Revenues	$ 6,779	$ 9,161	$ 32,988	$ 35,991
Revenues	11.30%	15.20%	15.10%	17.40%
Revenues	$ (2,382)		$ (3,003)
Revenues	(26.00%)		8.30%