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Note 13 - Computation of Earnings per Share - Computation of Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 2,985	$ 3,575
Weighted average shares - basic (in shares)	31,746	31,379
Weighted average shares - diluted (in shares)	32,733	32,075
Net income per share - basic (in dollars per share)	$ 0.09	$ 0.11
Net income per share - diluted (in dollars per share)	$ 0.09	$ 0.11

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.