XML 57 R45.htm IDEA: XBRL DOCUMENT v3.7.0.1
FINANCIAL INSTRUMENTS (Details 3)
6 Months Ended 12 Months Ended
Jun. 30, 2017
USD ($)
customer
Dec. 31, 2016
USD ($)
customer
Credit Risk    
Number of major customers | customer 3 3
Amount of allowance for doubtful accounts | $ $ 0 $ 0
Accounts receivable | Credit risk | Major customer one    
Credit Risk    
Concentration risk (as a percent) 34.00% 36.00%
Accounts receivable | Credit risk | Major customer two    
Credit Risk    
Concentration risk (as a percent) 29.00% 29.00%
Accounts receivable | Credit risk | Major customer three    
Credit Risk    
Concentration risk (as a percent) 27.00% 25.00%