Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

v3.8.0.1
COMMITMENTS AND CONTINGENCIES (Details)
ر.س in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
Mar. 31, 2018
SAR (ر.س)
Oct. 24, 2010
USD ($)
Oct. 24, 2010
SAR (ر.س)
Operating Lease Commitments [Abstract]          
Operating lease, rental expense $ 1,100 $ 800      
Supplier Agreements [Abstract]          
Shortfall fee expenses 100 900      
Expenses for environmental monitoring, compliance, and improvements 149 $ 165      
Pending Litigation [Member]          
Loss Contingencies [Line Items]          
Accrual recorded value 1,000        
Saudi Industrial Development Fund Limited Guarantee [Member]          
Guarantor Obligations [Line Items]          
Principal amount of loan guaranteed       $ 88,000 ر.س 330,000
Amount of maximum exposure $ 81,300   ر.س 305,000 $ 36,100 ر.س 135,330
Saudi Industrial Development Fund Limited Guarantee [Member] | Maximum [Member]          
Guarantor Obligations [Line Items]          
Loan guarantee       41.00% 41.00%