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Note 5 - Subsequent Event - Agreement to Purchase and Sell Real Estate (Details Textual) - Subsequent Event [Member] - Commercial Real Estate in Sulphur, Louisiana [Member]
Jul. 13, 2017
USD ($)
ft²
Area of Real Estate Property | ft² 44,000
Agreement to Purchase and Sell Real Estate, Amount | $ $ 2,725,000
Number of Buildings 3
Number of Land Parcels 2
Real Estate Agreement, Feasibility Period 90 days