Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions Related Party Transactions (Details)

v3.5.0.2
Related Party Transactions Related Party Transactions (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
CNY (¥)
Dec. 31, 2015
USD ($)
Related Party Transaction [Line Items]            
Note payable to related party noncurrent $ 14,629,000 $ 15,356,000 $ 14,629,000 $ 15,356,000   $ 15,030,000
Related party interest expense on note payable 253,000 275,000 779,000 827,000    
Swire Resources [Member]            
Related Party Transaction [Line Items]            
Related party service fees, interest expense and miscellaneous expenses 765,000 1,225,000 2,660,000 5,099,000    
Related party sourcing fees 73,000   61,000 362,000    
Note payable to related party noncurrent $ 14,629,000   $ 14,629,000      
Related party note payable maturity date Dec. 31, 2018          
Related party note payable interest rate 7.00%   7.00%   7.00%  
Related party interest expense on note payable $ 253,000 275,000 $ 779,000 827,000    
Accounts payable to related party current $ 948,000 $ 2,995,000 $ 948,000 $ 2,995,000   $ 1,472,000
China, Yuan Renminbi | Swire Resources [Member]            
Related Party Transaction [Line Items]            
Note payable to related party noncurrent | ¥         ¥ 97,600,000