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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 |  |  | $ 800,000 us-gaap_CostMethodInvestmentsFairValueDisclosure | $ 0 us-gaap_CostMethodInvestmentsFairValueDisclosure
Payments for (Proceeds from) Investments |  | 21,000,000 us-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 + Details
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- Definition 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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