Note 8 - Equity - Summary of Shares Available for Grant (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Beginning balance (in shares)	998
Granted from approved plans (in shares)	(247)	(353)	(1,855)	(1,422)
Cancelled and available for grant (in shares)	51
Ending balance (in shares)	733		733
Restricted Stock Units (RSUs) [Member]
Granted (in shares)	(69)	(27)	(106)	(165)