Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Summary of Changes in Fair Value of Company's Earn-Out Liability - Galvanized (Details)

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Fair Value of Financial Instruments - Summary of Changes in Fair Value of Company's Earn-Out Liability - Galvanized (Details) - USD ($)
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Earn-out payments to MUSA $ 1,618,767 $ 518,456
Marcegalia USA, Inc. - Galvanized | Level 3 Inputs    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance at December 31, 2017 0  
Fair value of the earn-out liability associated with the MUSA-Galvanized acquisition 3,800,298  
Earn-out payments to MUSA (127,710)  
Change in fair value during the period (219,548)  
Balance at September 30, 2018 $ 3,453,040