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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

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