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Earnings per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three months ended June 30, |  |  | Six months ended June 30, |
(in thousands, except per share amounts) |  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
EPS numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 709 |  |  | $ | 669 |  |  | $ | (1,715 | ) |  | $ | (545 | )
Less: Premium paid on redemption of redeemable convertible preferred stock |  |  | - |  |  |  | 244 |  |  |  | 2,219 |  |  |  | 482 |
Less: Undistributed preferred stock dividends |  |  | - |  |  |  | - |  |  |  | (113 | ) |  |  | - |
Net income (loss) attributable to Limbach Holdings, Inc. common stockholders |  | $ | 709 |  |  | $ | 425 |  |  | $ | (3,821 | ) |  | $ | (1,027 | )
EPS denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding – basic |  |  | 7,543 |  |  |  | 7,455 |  |  |  | 7,542 |  |  |  | 7,455 |
Impact of dilutive securities |  |  | 265 |  |  |  | 340 |  |  |  | - |  |  |  | - |
Weighted average shares outstanding – diluted |  |  | 7,808 |  |  |  | 7,795 |  |  |  | 7,542 |  |  |  | 7,455 |
Basic EPS attributable to common stockholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) attributable to Limbach Holdings, Inc. common stockholders |  | $ | 0.09 |  |  | $ | 0.06 |  |  | $ | (0.51 | ) |  | $ | (0.14 | )
Diluted EPS attributable to common stockholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) attributable to Limbach Holdings, Inc. common stockholders |  | $ | 0.09 |  |  | $ | 0.05 |  |  | $ | (0.51 | ) |  | $ | (0.14 | )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] | The following table summarizes the securities that were antidilutive, and therefore, were not included in the computations of diluted loss per common share:
|  | Three months ended June 30, |  |  | Six months ended Ju ne 30, |
|  | ‎ 2018 |  |  | ‎ 2017 |  |  | 2018 |  |  | 2017 |
Warrants (See Note 8) |  |  | - |  |  |  | - |  |  |  | 277,640 |  |  |  | 515,310 |
Class A Preferred Stock (See Note 9) |  |  | - |  |  |  | 800,000 |  |  |  | 34,033 |  |  |  | 800,000 |
Stock-based compensation (See Note 17) |  |  | - |  |  |  | - |  |  |  | 76,972 |  |  |  | - |
UPOs (See Note 8) |  |  | - |  |  |  | - |  |  |  | 4,502 |  |  |  | 5,915 |
Total |  |  |  |  |  |  | 800,000 |  |  |  | 393,147 |  |  |  | 1,321,225 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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