Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions Related Party Transactions (Details)

v3.7.0.1
Related Party Transactions Related Party Transactions (Details)
¥ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2017
CNY (¥)
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Related Party Transaction [Line Items]            
Non-controlling Interest, Ownership Percentage by Parent 60.00%   60.00%      
Repayments of Related Party Debt     $ 14,236,000   $ 0  
Note payable to related party noncurrent $ 0 $ 14,681,000 0   14,681,000 $ 14,053,000
Related party interest expense on note payable 180,000 262,000 429,000   526,000  
Swire Resources [Member]            
Related Party Transaction [Line Items]            
Related party service fees, interest expense and miscellaneous expenses 329,000 1,042,000 845,000   1,895,000  
Related party sourcing fees 4,000 10,000 5,000   61,000  
Related party interest expense on note payable 180,000 262,000 429,000   526,000  
Accounts payable to related party current $ 340,000 $ 1,042,000 $ 340,000   $ 1,042,000 $ 707,000
China, Yuan Renminbi            
Related Party Transaction [Line Items]            
Repayments of Related Party Debt | ¥       ¥ 97,600