REVENUES (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenues

Additionally, the below tables summarize the geographic data for our revenues:

	Three Months Ended June 30, 2021
	U.S.		Canada		Total
	(in thousands)
Third party	$	9,854	$	21,345	$	31,199
Related party	$	2,322	$	—	$	2,322

	Three Months Ended June 30, 2020
	U.S.		Canada		Total
	(in thousands)
Third party	$	6,653	$	15,771	$	22,424
Related party	$	2,115	$	2,897	$	5,012

	Six Months Ended June 30, 2021
	U.S.		Canada		Total
	(in thousands)
Third party	$	17,492	$	41,992	$	59,484
Related party	$	4,636	$	—	$	4,636

	Six Months Ended June 30, 2020
	U.S.		Canada		Total
	(in thousands)
Third party	$	13,702	$	33,629	$	47,331
Related party	$	4,420	$	5,891	$	10,311

Schedule of remaining performance obligations

The transaction price allocated to the remaining performance obligations associated with our terminalling and fleet services agreements as of June 30, 2021 are as follows for the periods indicated:

	For the six months ended December 31, 2021		2022		2023		2024		Thereafter		Total
	(in thousands)
Terminalling Services (1) (2) (3)	$	48,677	$	75,775	$	38,063	$	19,528	$	126,932	$	308,975
Fleet Services	455		1,195		—		—		—		1,650
Total	$	49,132	$	76,970	$	38,063	$	19,528	$	126,932	$	310,625

(1)A significant portion of our terminalling services agreements are denominated in Canadian dollars. We have converted the remaining performance obligations associated with these Canadian dollar-denominated contracts using the year-to-date average exchange rate of 0.802 U.S. dollars for each Canadian dollar at June 30, 2021.

(2)Includes fixed monthly minimum commitment fees per contracts and excludes constrained estimates of variable consideration for rate-escalations associated with an index, such as the consumer price index, as well as any incremental revenue associated with volume activity above the minimum volumes set forth within the contracts. Also excludes estimated constrained variable consideration included in certain of our terminalling services agreements that is based on crude oil pricing index differentials.

(3)Assumes USD’s Diluent Recovery Unit project goes into service in the second half of 2021, which will result in certain terminalling services agreements of our Hardisty Terminal being automatically extended through mid-2031 and certain agreements at our Stroud Terminal having a termination right in June 2022.

Schedule of changes of balance of contract liabilities

We had the following amounts outstanding associated with our contract assets on our consolidated balance sheets in the financial statement line items presented below in the following table for the indicated periods:

	June 30, 2021		December 31, 2020
	(in thousands)
Other current assets	$	173	$	1,622

The following table presents the amounts outstanding on our consolidated balance sheets and changes associated with the balance of our deferred revenue for the six months ended June 30, 2021:

	December 31, 2020		Cash Additions for Customer Prepayments		Revenue Recognized		June 30, 2021
	(in thousands)
Deferred revenue	$	6,367	$	5,949	$	(6,367)	$	5,949
Other current liabilities	$	—	$	2,122	$	—	$	2,122
Other non-current liabilities (1)	$	10,087	$	912	$	—	$	10,999

(1)    Includes cumulative revenue that has been deferred due to tiered billing provisions included in certain of our Canadian dollar-denominated contracts, as discussed above. As such, the change in “Other non-current liabilities” presented has been increased by $281 thousand due to the impact of the change in the end of period exchange rate between December 31, 2020 and June 30, 2021.