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Activity in Level Three Warrants (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
Activity in Level Three Warrants (Detail) (USD $)	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012	Mar. 31, 2012
Class of Warrant or Right [Line Items]
Level 3 Warrants, beginning of period			$ 292,000	$ 292,000	$ 26,000
Addition - PFG Warrants, initial fair value					434,000
Change in fair value of warrant liability	(107,000)	4,000	89,000	(13,000)	(168,000)
Level 3 Warrants, end of period	$ 381,000		$ 381,000		$ 292,000

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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