Note 5 - Investment Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 27, 2015	Mar. 29, 2015
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Assets, Fair Value Disclosure	$ 4	$ 6
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Assets, Fair Value Disclosure
Money Market Funds [Member]
Assets:
Assets, Fair Value Disclosure	$ 4	$ 6
CounterPath [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Assets, Fair Value Disclosure
CounterPath [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Assets, Fair Value Disclosure	$ 43	$ 48
CounterPath [Member]
Assets:
Assets, Fair Value Disclosure	43	48
Fair Value, Inputs, Level 1 [Member]
Assets:
Assets, Fair Value Disclosure	4	6
Fair Value, Inputs, Level 2 [Member]
Assets:
Assets, Fair Value Disclosure	43	48
Assets, Fair Value Disclosure	$ 47	$ 54