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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Sep. 30, 2018
Jun. 30, 2018
Retained Earnings [Member]        
Dividends paid, per share (in dollars per share) $ 0.16 $ 0.16 $ 0.16 $ 0.16
Common Stock Including Additional Paid in Capital [Member]        
Proceeds from issuance of common stock, issuance costs $ 5,568      
Allocated costs and taxes $ 9,427