Annual report pursuant to Section 13 and 15(d)

Note 6 - Earnings Per Share (Details Textual)

v3.8.0.1
Note 6 - Earnings Per Share (Details Textual) - shares
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Stock Options, Warrants, Convertible Debt, and Convertible Preferred Stock [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 14,500,000 14,100,000 14,600,000
Restricted Stock Units (RSUs) [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 150,000 207,000 361,000