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Note 17 - Financial Instruments and Fair Value Measurements (Details) (Rock Ohio Ventures [Member], USD $)	0 Months Ended	12 Months Ended
	Jan. 25, 2015	Dec. 29, 2013	Dec. 28, 2014	Sep. 28, 2014
Note 17 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Cost Method Investments, Fair Value Disclosure			$ 800,000us-gaap_CostMethodInvestmentsFairValueDisclosure	$ 0us-gaap_CostMethodInvestmentsFairValueDisclosure
Payments for (Proceeds from) Investments		21,000,000us-gaap_PaymentsForProceedsFromInvestments
Subsequent Event [Member]
Note 17 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Payments for (Proceeds from) Investments	$ (800,000)us-gaap_PaymentsForProceedsFromInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = laco_RockOhioVenturesMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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- Definition

Fair value portion of investments accounted under the cost method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=29638263&loc=d3e39828-111592

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The net cash paid (received) associated with the acquisition or disposal of all investments, including securities and other assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585



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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

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-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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