Note 13 - Net Income (Loss) Per Share (Details) - Summary of Net Income (Loss) per Share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Summary of Net Income (Loss) per Share [Abstract]
Net loss attributable to Exar Corporation (in Dollars)	$ (4,197)	$ (23,352)	$ (6,707)	$ (35,457)
Shares used in computation of net loss per share:
Basic	48,121	47,139	48,024	47,188
Effect of options and awards	0	0	0	0
Diluted	48,121	47,139	48,024	47,188
Net loss per share
Basic (in Dollars per share)	$ (0.09)	$ (0.50)	$ (0.14)	$ (0.75)
Diluted (in Dollars per share)	$ (0.09)	$ (0.50)	$ (0.14)	$ (0.75)