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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Contract Balances
The timing of revenue recognition, billings, and cash collection may result in contract assets or contract liabilities. For certain contracts, the customer has agreed to pay us before we have satisfied our performance obligations. Customer payments received before we have satisfied our performance obligations are accounted for as a contract liability. As of December 31, 2018, we had $11.7 million of contract liabilities, which are included in "Other current liabilities" on the consolidated balance sheet. 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 year ended December 31, 2018, is shown below (in thousands):
 
 
Year Ended December 31,

 
2018
Beginning balance
 
$
—

Additions
 
17,558

Recognized as revenue during period
 
(5,880
)
Ending Balance
 
$
11,678
Disaggregation of Revenue
We generated revenue from the following products for the last three years. 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. Amounts presented are in thousands:
 
 
Year Ended December 31,
Product
 
2018
 
2017
 
2016
Potash
 
$
107,471

 
$
95,540

 
$
149,335

Trio®
 
64,139

 
63,338

 
52,884

Water
 
19,797

 
7,042

 
—

Salt
 
6,877

 
6,334

 
2,947

Magnesium Chloride
 
6,804

 
5,432

 
6,931

Brines
 
1,777

 
229

 
—

Other
 
1,405

 
—

 
—

Total Revenue
 
$
208,270

 
$
177,915

 
$
212,097