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Note 19 - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member]
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Restricted Stock Unit Activity [Line Items]  
Outstanding | shares 685,430
Granted | shares 387,187
Vested | shares (237,957)
Forfeited | shares (60,115)
Outstanding | shares 774,545
Outstanding | $ / shares $ 22.15
Granted | $ / shares 14.86
Vested | $ / shares 21.73
Forfeited | $ / shares 15.74
Outstanding | $ / shares $ 19.13