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Organization (Details)
Sep. 01, 2014
USD ($)
Aug. 01, 2011
USD ($)
Jul. 07, 2015
May. 31, 2015
subsidiary
hotel_room
restaurant
slot_machine
table_game
property
golf_course
$ / shares
Sep. 19, 2014
$ / shares
shares
Aug. 31, 2014
May. 31, 2014
employee
shares
Schedule of Equity Method Investments [Line Items]              
Number of wholly owned subsidiaries | subsidiary       2      
Number of properties with controlling interest (properties) | property       6      
Number of hotel rooms | hotel_room       3,300      
Number of table games | table_game       240      
Number of restaurants | restaurant       40      
Number of slot machines | slot_machine       7,800      
Number of video lottery terminals | slot_machine       2,150      
Number of championship golf courses | golf_course       2      
Newport              
Schedule of Equity Method Investments [Line Items]              
Number of employees | employee             10
Eldorado              
Schedule of Equity Method Investments [Line Items]              
Equity method investee percentage ownership in JV (percent)       17.0359%      
Eldorado | 96% owned subsidiary              
Schedule of Equity Method Investments [Line Items]              
Equity investee ownership interest in subsidiary (percent)       96.00%      
Eldorado | Silver Legacy Resort Casino              
Schedule of Equity Method Investments [Line Items]              
Equity method investee percentage ownership in JV (percent)       50.00%      
Mesquite              
Schedule of Equity Method Investments [Line Items]              
Ownership percentage in equity method investment (percent)       40.00%      
Common stock issued (shares) | shares         4,040,440   4,030,440
Par value (usd per share) | $ / shares       $ 0.00001 $ 0.00001    
Equity method investee percentage ownership in JV (percent)       8.60% 8.60%    
Cash payment to acquire equity method investment   $ 8,222,222          
Mesquite | NGOF              
Schedule of Equity Method Investments [Line Items]              
Cash payment to acquire equity method investment   7,222,222          
Mesquite | NGCF              
Schedule of Equity Method Investments [Line Items]              
Cash payment to acquire equity method investment   $ 1,000,000          
Tamarack Crossing, LLC              
Schedule of Equity Method Investments [Line Items]              
Equity method investee percentage ownership in JV (percent)           21.25%  
Proceeds from divestiture of interest in joint venture $ 1,350,000            
Subsequent Event | Eldorado | 96% owned subsidiary              
Schedule of Equity Method Investments [Line Items]              
Equity investee ownership interest in subsidiary (percent)     96.00%        
Subsequent Event | Eldorado | Silver Legacy Resort Casino              
Schedule of Equity Method Investments [Line Items]              
Equity method investee percentage ownership in JV (percent)     50.00%        
Equity investee ownership interest in subsidiary (percent)     50.00%