Annual report pursuant to Section 13 and 15(d)

Acquisitions (Sources and Uses of Funds) (Details)

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Acquisitions (Sources and Uses of Funds) (Details) - Specialty Pipe And Tube, Inc. [Member] - USD ($)
12 Months Ended
Nov. 21, 2014
Dec. 31, 2016
Dec. 31, 2015
Jan. 03, 2015
Business Acquisition [Line Items]        
Purchase Price $ 31,490,433      
Sources of funds:        
Cash on hand 21,490,433      
Proceeds from term loan 10,000,000      
Uses of funds:        
Acquisition of Specialty's common stock 27,496,000 $ 0 $ 0 $ 31,490,433
Cash paid to escrow agent for potential future claims, to be settled within 18 months 3,248,500      
Cash paid for a portion of the seller's investment banker fee $ 745,933