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Note 10 - Financial Instruments and Fair Value Measurements (Details Textual)
3 Months Ended 12 Months Ended
Jan. 29, 2016
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Jul. 31, 2015
USD ($)
Land [Member]        
Tangible Asset Impairment Charges   $ 0 $ 0  
Land and Land Improvements [Member] | Sartini Gaming [Member] | Fair Value, Inputs, Level 3 [Member]        
Property, Plant, and Equipment, Fair Value Disclosure       $ 37,800,000
Other Assets Acquired [Member] | Sartini Gaming [Member] | Fair Value, Inputs, Level 3 [Member]        
Property, Plant, and Equipment, Fair Value Disclosure       46,300,000
Initial Montana Acquisition [Member]        
Business Combination, Contingent Consideration, Liability   $ 2,000,000    
Business Combination, Contingent Consideration Arrangements, Number of Periodic Payment 4 4    
Sartini Gaming [Member] | Fair Value, Inputs, Level 3 [Member]        
Finite and Indefinite-lived Intangible Assets, Excluding Goodwill, Fair Value Disclosure       $ 80,800,000