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Commitments and Contingencies (Details) - USD ($) $ in Millions |  |  |  | 1 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 17, 2020 | Jan. 23, 2020 | Nov. 13, 2019 | Jul. 31, 2020 | Dec. 31, 2020
Surety Bond |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Long-term debt |  |  |  |  | $ 79.4
Lanzo Trenchless Technologies vs. Limbach Company LLC | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, damages sought, value |  |  | $ 0.4 |  |
Bernards Bros vs. Limbach Holdings | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, damages sought, value |  | $ 3.0 |  |  |
LA Excavating, Inc. vs. Limbach Company LP | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, damages sought, value | $ 1.0 |  |  |  |
Kimball Construction Co., Inc. vs. Limbach Company LLC | Pending Litigation |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, damages sought, value |  |  |  | $ 1.7 |

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