Annual report pursuant to Section 13 and 15(d)

Fair Value of Financial Instruments - Narrative (Details)

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Fair Value of Financial Instruments - Narrative (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
financial_instrument
Dec. 31, 2019
USD ($)
financial_instrument
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair value of equity securities   $ 4,300,000 $ 4,300,000 $ 2,900,000  
Derivative asset, number of instruments held | financial_instrument   1 1    
Earn-out adjustments     $ (747,000) 1,431,000 $ 688,000
American Stainless Tubing, Inc.          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Customer list intangible   $ (496,000)      
Charge related to change in fair value of earn-out liability   (218,000)      
Earn-out adjustments $ 200,000        
Term Loan | Palmer of Texas | Interest Rate Swap | Level 2 inputs          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Derivative asset, fair value, gross asset   $ 6,088 $ 6,088 $ 100,000  
Customer List | American Stainless Tubing, Inc.          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Customer list intangible $ 500,000