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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
Income Tax Disclosure [Abstract]
Canadian statutory rate	26.40%	26.40%	26.20%
Rate differential for U.S. operations	5.10%	2.00%	(7.30%)
Adjustment to valuation allowance	(30.70%)	(26.80%)	21.00%
Utilization of unrecognized losses and other tax attributes	0.00%	0.00%	(45.30%)
Permanent differences and other	(0.80%)	(2.10%)	6.70%
Total	0.00%	(0.50%)	1.30%

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Effective Income Tax Rate Reconciliation Effect Of Permanent Differences Other

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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