Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stock-based Compensation - Nonvested Option Awards Activity (Details)

v3.20.1
Note 4 - Stock-based Compensation - Nonvested Option Awards Activity (Details) - $ / shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Nonvested, Shares, Balance (in shares) 23,500  
Nonvested, weighted average grant date fair value (in dollars per share) $ 0.17  
Options granted, shares (in shares) 0 0
Granted, weighted average grant date fair value (in dollars per share)  
Vested, shares (in shares) (5,000)  
Vested, weighted average grant date fair value (in dollars per share) $ 0.21  
Forfeited, shares (in shares)  
Forfeited, weighted average grant date fair value (in dollars per share)  
Nonvested, shares (in shares) 18,500  
Nonvested, weighted average grant date fair value (in dollars per share) $ 0.15