Annual report pursuant to Section 13 and 15(d)

SETTLEMENTS, COMMITMENTS AND CONTINGENCIES - Litigation Settlements (Details)

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SETTLEMENTS, COMMITMENTS AND CONTINGENCIES - Litigation Settlements (Details) - Case Vs. Silver Slipper Casino And Hotel Contractor And Architect - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2014
Settled Litigation | Construction Defects Receivable        
Loss Contingencies [Line Items]        
Litigation settlement amount $ 675      
Legal fees   $ 100 $ 100  
Positive Outcome of Litigation | Pending Litigation        
Loss Contingencies [Line Items]        
Damages sought       $ 1,600