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