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10. COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Future minimum contractual lease obligations
Years ending December 31   Operating Leases 
 2018    1,455 
 2019    1,455 
 2020    1,455 
 2021    1,395 
 2022    1,174 
 Thereafter    1,663 
 Total minimum lease payments   $8,597