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Note 6 - Real Estate Transaction (Details Textual)
$ in Millions
1 Months Ended
Mar. 31, 2019
USD ($)
Payments to Acquire Real Estate, Total $ 52.9
Real Estate, Capitalized Transaction Costs $ 0.4
Leases, Acquired-in-Place [Member]  
Finite-Lived Intangible Asset, Useful Life (Year) 3 years 6 months
Building [Member]  
Property, Plant and Equipment, Useful Life (Year) 40 years