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 6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
CNY (¥)
Dec. 31, 2015
USD ($)
Related Party Transaction [Line Items]            
Note payable to related party noncurrent $ 14,681,000 $ 15,739,000 $ 14,681,000 $ 15,739,000   $ 15,030,000
Related party interest expense on note payable 262,000 278,000 526,000 552,000    
Swire Resources [Member]            
Related Party Transaction [Line Items]            
Related party service fees, interest expense and miscellaneous expenses 1,042,000 2,120,000 1,895,000 3,875,000    
Related party sourcing fees 10,000   61,000 289,000    
Note payable to related party noncurrent $ 14,681,000   $ 14,681,000      
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 $ 262,000 278,000 $ 526,000 552,000    
Accounts payable to related party current $ 1,042,000 $ 6,769,000 $ 1,042,000 $ 6,769,000   $ 1,472,000
China, Yuan Renminbi | Swire Resources [Member]            
Related Party Transaction [Line Items]            
Note payable to related party noncurrent | ¥         ¥ 97,600,000