REVENUE

Revenue Recognition—Under ASC 606, we recognize revenue when control of the promised goods or services is transferred to customers in an amount that reflects the consideration we expect to be entitled in exchange for those goods or services.

Contract Balances—As of December 31, 2019, and 2018, we had $16.6 million and $11.7 million of contract liabilities, respectively, which are included in "Other current liabilities" on the consolidated balance sheets. Our contract liability relates to payments received from customers for water purchases for which we have not yet delivered the water. Our contract liability activity for the years ended December 31, 2019, 2018, and 2017 is shown below (in thousands):



	Year Ended December 31,
	2019			2018
Beginning balance	$	11,678		$	—
Additions	11,058			17,558
Recognized as revenue during period	(6,124		)	(5,880		)
Ending balance	$	16,612		$	11,678

Disaggregation of Revenue—The table below shows the disaggregation of revenue by product and reconciles disaggregated revenue to segment revenue for the years ended December 31, 2019, 2018, and 2017. We believe the disaggregation of revenue by products best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic conditions (in thousands):



	Year Ended December 31, 2019
Product	Potash Segment		Trio^® Segment		Oilfield Solutions Segment		Intersegment Eliminations			Total
Potash	$	103,403	$	—	$	2,973	$	(1,909	)	$	104,467
Trio^®	—		64,299		—		—			64,299
Water	1,823		4,495		19,339		—			25,657
Salt	12,022		757		—		—			12,779
Magnesium Chloride	4,907		—		—		—			4,907
Brines	2,493		—		—		—			2,493
Other	—		—		5,582		(109		)	5,473
Total Revenue	$	124,648	$	69,551	$	27,894	$	(2,018	)	$	220,075



	Year Ended December 31, 2018
Product	Potash Segment		Trio^® Segment		Oilfield Solutions Segment		Intersegment Eliminations		Total
Potash	$	107,471	$	—	$	—	$	—	$	107,471
Trio^®	—		64,139		—		—		64,139
Water	1,368		2,430		15,999		—		19,797
Salt	6,638		239		—		—		6,877
Magnesium Chloride	6,804		—		—		—		6,804
Brines	1,777		—		—		—		1,777
Other	—		—		1,405		—		1,405
Total Revenue	$	124,058	$	66,808	$	17,404	$	—	$	208,270



	Year Ended December 31, 2017
Product	Potash Segment		Trio^® Segment		Oilfield Solutions Segment		Intersegment Eliminations		Total
Potash	$	95,540	$	—	$	—	$	—	$	95,540
Trio^®	—		63,338		—		—		63,338
Water	441		289		6,312		—		7,042
Salt	6,275		59		—		—		6,334
Magnesium Chloride	5,432		—		—		—		5,432
Brines	229		—		—		—		229
Total Revenue	$	107,917	$	63,686	$	6,312	$	—	$	177,915