FINANCIAL INSTRUMENTS (Tables)

3 Months Ended

Mar. 31, 2019

FINANCIAL INSTRUMENTS

Schedule of Fair Value on Recurring and Non-recurring Basis

The following table presents information about assets that were recorded at fair value on a recurring and non-recurring basis as of March 31, 2019 and December 31, 2018 and indicate the fair value hierarchy.

	March 31, 2019
(thousands of dollars)	Level 1		Level 2		Level 3		Total
Non-current Assets
Restricted cash	$	3,750	$	—		—	$	3,750
Total non-current assets recorded at fair value	$	3,750	$	—	$	—	$	3,750

	December 31, 2018
(thousands of dollars)	Level 1		Level 2		Level 3		Total
Current Assets
Short-term available-for-sale investments	$	415	$	—	$	—	$	415
Total current assets recorded at fair value	$	415	$	—	$	—	$	415
Non-current Assets
Restricted cash	$	3,732	$	—		—	$	3,732
Total non-current assets recorded at fair value	$	3,732	$	—	$	—	$	3,732