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STATEMENTS OF CASH FLOWS (Tables)
 3 Months Ended
Mar. 31, 2017
Statement of Cash Flows [Abstract]  
Changes in current assets and liabilities
Changes in current assets and current liabilities were as follows: 
 
Three Months Ended March 31,
 
2017
 
2016
 
(Thousands of Dollars)
Decrease (increase) in current assets:
 
 
 
Receivable from related party, net
$
—

 
$
1,143

Other receivables
—

 
(32
)
Prepaid expenses and other current assets
(40
)
 
76

Increase (decrease) in current liabilities:
 
 
 
Payable to related party
(237
)
 
—

Accounts payable
172

 
(220
)
Accrued compensation expense
—

 
(1,339
)
Accrued liabilities
(201
)
 
(81
)
Taxes other than income tax
(56
)
 
(1,538
)
Changes in current assets and current liabilities
$
(362
)
 
$
(1,991
)
Cash flows related to interest and income tax
Cash flows related to interest were as follows:
 
Three Months Ended March 31,
 
2017
 
2016
 
(Thousands of Dollars)
Cash paid for interest
$
251

 
$
200