Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Dec. 31, 2016

Notes Tables

Revenue from External Customers by Geographic Areas [Table Text Block]

	Three Months Ended						Nine Months Ended
	December 31, 2016			December 31, 2015			December 31, 2016			December 31, 2015
International revenues		27	%		15	%		27	%		18	%
Domestic revenues		73	%		85	%		73	%		82	%
Total revenues		100	%		100	%		100	%		100	%