Note 5 - Capitalized Software Development Costs (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2017
Capitalized Computer Software, Period Increase (Decrease)	$ 600	$ 500	$ 1,800	$ 1,300
Capitalized Computer Software, Amortization	500	$ 300	1,200	800
Capitalized Computer Software, Net	$ 2,907		2,907		$ 2,341
Capitalized Computer Software, Impairments			$ 0	$ 0
Capitalized Software Development Costs [Member]
Finite-Lived Intangible Asset, Useful Life			3 years