Annual report pursuant to Section 13 and 15(d)

CONCENTRATIONS OF REVENUES AND CREDIT RISK (Details)

v3.6.0.2
CONCENTRATIONS OF REVENUES AND CREDIT RISK (Details)
12 Months Ended
Dec. 31, 2016
USD ($)
Customer
Supplier
Dec. 31, 2015
USD ($)
Customer
Supplier
Dec. 31, 2014
USD ($)
Customer
Supplier
Concentration Risk [Line Items]      
Accounts receivable $ 22,193,000 $ 19,474,000  
Number of major supplier | Supplier 1 1 1
Amount owed to supplier for feedstock purchases $ 3,700,000 $ 2,500,000  
Cash insured by the Federal Deposit Insurance Corporation $ 250,000    
Supplier Concentration Risk [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 99.40% 100.00% 100.00%
Sales [Member]      
Concentration Risk [Line Items]      
Number of major customer | Customer 1 1 2
Sales [Member] | Revenue Concentration Risk [Member] | Major Customer One [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 20.10% 20.10% 23.20%
Sales [Member] | Revenue Concentration Risk [Member] | Major Customer Two [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage     10.50%
Sales [Member] | Foreign Jurisdiction Concentration Risk [Member]      
Concentration Risk [Line Items]      
Concentration risk, percentage 23.50% 26.00% 30.50%
Accounts Receivable [Member] | Major Customer One [Member]      
Concentration Risk [Line Items]      
Accounts receivable $ 5,100,000 $ 7,600,000 $ 9,500,000
Accounts Receivable [Member] | Major Customer Two [Member]      
Concentration Risk [Line Items]      
Accounts receivable     $ 1,600,000