Note 3 - Business Combinations (Details) - Unaudited Pro Forma Condensed Financial Information (Integrated Memory Logic Limited [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 29, 2014	Jun. 30, 2013
Integrated Memory Logic Limited [Member]
Note 3 - Business Combinations (Details) - Unaudited Pro Forma Condensed Financial Information [Line Items]
Net sales	$ 41,286	$ 49,177
Net loss	(7,675)	(722)
Less: Net loss attributable to non-controlling interests	(105)	(122)
Net loss attributable to Exar Corporation	$ (7,570)	$ (600)
Earnings per share
Basic (in Dollars per share)	$ (0.16)	$ (0.01)
Diluted (in Dollars per share)	$ (0.16)	$ (0.01)