XML 37 R26.htm IDEA: XBRL DOCUMENT v3.5.0.2
Note 2 - Stock-based Compensation - Stock Option Activity (Details) - $ / shares
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Outstanding, January 1 (in shares) 31,949 46,451
Outstanding, January 1 (in dollars per share) $ 25.03 $ 27.90
Expired (in shares) 0 (3,639)
Expired (in dollars per share) $ 37.33
Exercised (in shares) 0 (1,025)
Exercised (in dollars per share) $ 0 $ 20.21
Outstanding, September 30 (in shares) 31,949 41,787
Outstanding, September 30 (in dollars per share) $ 25.03 $ 27.27
Exercisable, September 30 (in shares) 31,949 41,787
Exercisable, September 30 (in dollars per share) $ 25.03 $ 27.27