Other Assets (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2011	Jul. 24, 2010
Other Assets
Filing fee related to application		$ 1,046
Amount of nonrefundable fees reclassified to intangible assets	$ 398

Aggregate carrying amount of application fees nonrefundable amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet, which will be reclassified to intangible assets.

No definition available.

Name:	lci_NewDrugApplicationFeesNonrefundablePortionReclassifiedToIntangibleAssets
Namespace Prefix:	lci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant