Annual report pursuant to Section 13 and 15(d)

Debt (Details Textual)

v3.7.0.1
Debt (Details Textual) - USD ($)
$ in Thousands
5 Months Ended 7 Months Ended 12 Months Ended
Dec. 21, 2016
Dec. 31, 2016
Jul. 19, 2016
Dec. 31, 2016
Dec. 31, 2015
Jan. 31, 2016
Debt Instrument, Payment Terms       13.0% payable quarterly in cash, and the Company had the option either to pay the remaining 3.0% in cash or have it deferred and capitalized into the Subordinated Loan balance.    
Debt Instrument, Maturity Date   Jul. 20, 2023        
Debt Instrument, Convertible, Terms of Conversion Feature       Upon a Conversion Event (defined as a prepayment of more than 75% of the original principal of the loans, an acceleration, a Change of Control (as defined therein) or maturity), the Subordinated Loan holders could have elected to receive, in satisfaction of all or a portion of the outstanding principal of the Subordinated Loan (which constitutes the deferred interest portion of the loan), the number of shares of Limbach common stock equal to the deferred interest portion of the loan divided by $10.00 per share (the Conversion Shares). The Subordinated Loan holders could have further elected to be paid entirely in Limbach stock or to receive a cash payment equal to the deferred interest portion of the loan being converted, plus shares of Limbach stock determined by a formula equal to the Conversion Shares, minus the Liquidation Shares (defined as the portion of the deferred interest portion of the loan being converted, divided by the five-day weighted trading average of a share of Limbach Stock for the five Business Days preceding the trigger date). Upon a Conversion Event, the subordinated debt holders had registration rights with respect to such shares, including one demand registration right and usual and customary piggy-back registration rights, pursuant to a registration rights agreement.    
Prepayment Fees Percentage 3.00% 3.00%        
Line of Credit Facility, Maximum Borrowing Capacity   $ 30,000   $ 30,000   $ 7,500
Debt Instrument, Basis Spread on Variable Rate       3.25%    
Line of Credit Facility, Current Borrowing Capacity           5,500
Line of Credit Facility, Remaining Borrowing Capacity           2,000
Debt Instrument, Description of Variable Rate Basis       Libor plus 3.25    
Capital Lease Obligations [Member] | Minimum [Member]            
Debt Instrument, Interest Rate, Stated Percentage   4.90%   4.90%    
Capital Lease Obligations [Member] | Maximum [Member]            
Debt Instrument, Interest Rate, Stated Percentage   5.30%   5.30%    
London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Description of Variable Rate Basis       3.49% assuming 30-day LIBOR    
Financial Standby Letter of Credit [Member]            
Long-term Debt, Gross         $ 3,400  
Subordinated Debt [Member]            
Debt Instrument, Face Amount   $ 13,000   $ 13,000    
Debt Instrument, Maturity Date   Jul. 20, 2022        
Debt Instrument, Interest Rate, Stated Percentage   16.00%   16.00%    
Payment in Kind (PIK) Note [Member]            
Debt Instrument, Interest Rate, Stated Percentage   13.00%   13.00%    
Predecessor [Member]            
Prepayment Fees Percentage     3.00%      
Revolving Credit Facility [Member]            
Debt Instrument, Payment Terms       Commencing with the fiscal year ending December 31, 2017, the Company will be required to remit an amount equal to 50% of the excess cash flow (as defined in the Credit Agreement) of the Company, which percentage will be reduced based on the Senior Leverage Ratio (as defined therein).    
Line of Credit Facility, Maximum Borrowing Capacity   $ 21,600   $ 21,600 $ 18,000  
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage         0.40%  
Long-term Debt, Gross   0   $ 0    
Debt Instrument, Description of Variable Rate Basis       LIBOR plus 2.75%    
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Description of Variable Rate Basis       2.99% assuming 30-day LIBOR    
Revolving Credit Facility [Member] | Predecessor [Member]            
Long-term Debt, Gross         $ 7,000  
Senior Credit Facility [Member]            
Debt Instrument Interest Payment Term       In conjunction with the completion of the Business Combination on July 20, 2016, the Companys existing subordinated debt was paid in full and LFS entered into a new subordinated debt agreement. The new subordinated debt agreement consisted of a $13.0 million loan with a maturity date of July 20, 2022 (the Subordinated Loan). Principal payments were not required prior to maturity. Outstanding borrowings bore interest at 16.0%, with 13.0% payable quarterly in cash, and the Company had the option either to pay the remaining 3.0% in cash or have it deferred and capitalized into the Subordinated Loan balance.    
Line of Credit Facility, Maximum Borrowing Capacity           $ 35,000
Loans Payable [Member] | Senior Credit Facility [Member]            
Debt Instrument, Periodic Payment, Principal       $ 750,000    
Senior Credit Facility Agreement [Member] | Revolving Credit Facility [Member]            
Debt Instrument, Face Amount   $ 24,000   $ 24,000    
Debt Instrument, Maturity Date   Jun. 30, 2018        
Debt Instrument, Interest Rate, Stated Percentage   4.52%   4.52%    
Senior Credit Facility Agreement [Member] | Loans Payable [Member]            
Debt Instrument, Face Amount   $ 25,000   $ 25,000    
Debt Instrument, Periodic Payment, Principal   $ 900,000