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Note 18 - Subsequent Events (Details Textual) - Director [Member] - shares
Nov. 12, 2019
Aug. 14, 2019
May 14, 2019
Mar. 28, 2019
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total   6,111 4,235 13,820
Subsequent Event [Member]        
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total 9,845