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Contracts in Progress (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Dec. 31, 2017
Subcontract Payable Retainage | $ 11.2 | $ 11.2 | $ 11.1
Gross profit write Up | 0.4 | 0.6 |
Five construction projects [Member] |  |  |
Gross profit write down | 3.9 | 8.0 |
Service project write down |  | 0.9 |
Four construction projects [Member] |  |  |
Gross profit write Up | $ 0.4 | $ 2.4 |

X
- Definition It represents gross profit write down. + References No definition available. + Details
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- Definition It represents gross profit write up. + References No definition available. + Details
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- Definition It represents service project write down. + References No definition available. + Details
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Namespace Prefix: | lmb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The amount of retainage payable that have been withheld because of retainage provisions in a contract. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |