Annual report pursuant to Section 13 and 15(d)

Note 7 - Stock-based Compensation - Stock Options Outstanding (Details)

v3.8.0.1
Note 7 - Stock-based Compensation - Stock Options Outstanding (Details)
Dec. 31, 2017
$ / shares
shares
Outstanding options, weighted average exercise price (in dollars per share) $ 1.39
Exercisable options (in shares) | shares 324,696
Exercisable options, weighted average exercise price (in dollars per share) $ 1.86
Exercise Price Range 1 [Member]  
Outstanding options, weighted average exercise price (in dollars per share) $ 1.80
Exercisable options (in shares) | shares 200,977
Exercisable options, weighted average exercise price (in dollars per share) $ 1.80
Exercise Price Range 2 [Member]  
Outstanding options, weighted average exercise price (in dollars per share) $ 2.02
Exercisable options (in shares) | shares 50,000
Exercisable options, weighted average exercise price (in dollars per share) $ 2.02
Exercise Price Range 3 [Member]  
Outstanding options, weighted average exercise price (in dollars per share) $ 2.19
Exercisable options (in shares) | shares 50,000
Exercisable options, weighted average exercise price (in dollars per share) $ 2.19
Exercise Price Range 4 [Member]  
Outstanding options, weighted average exercise price (in dollars per share) $ 1.33
Exercisable options (in shares) | shares 23,719
Exercisable options, weighted average exercise price (in dollars per share) $ 1.33
Exercise Price Range 5 [Member]  
Outstanding options, weighted average exercise price (in dollars per share) $ 1.23
Exercisable options (in shares) | shares
Exercisable options, weighted average exercise price (in dollars per share)
Exercise Price Range 6 [Member]  
Outstanding options, weighted average exercise price (in dollars per share) $ 1.26
Exercisable options (in shares) | shares
Exercisable options, weighted average exercise price (in dollars per share)