XML 41 R30.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 5 - Share-based Compensation - Summary of Status of Company's Stock Options (Details)
 6 Months Ended
Jun. 30, 2017
USD ($)
$ / shares
shares
Balance (in shares) | shares 26,000
Balance (in dollars per share) | $ / shares $ 24.97
Balance (in dollars per share) | $ / shares $ 24.15
Balance (Year)
Balance | $
Exercisable, June 30, 2017 (in shares) | shares 24,000
Exercisable, June 30, 2017 (in dollars per share) | $ / shares $ 24.15
Options granted (in shares) | shares
Options granted (in dollars per share) | $ / shares
Options exercised (in shares) | shares
Options exercised (in dollars per share) | $ / shares
Options canceled (in shares) | shares (2,000)
Options canceled (in dollars per share) | $ / shares $ 34.77
Balance (in shares) | shares 24,000
Exercisable, June 30, 2017 (Year) 2 years 273 days
Exercisable, June 30, 2017 | $