Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock-based Compensation - Summary of Unvested Restricted Stock (Details)

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Note 6 - Stock-based Compensation - Summary of Unvested Restricted Stock (Details) - Restricted Stock [Member]
9 Months Ended
Sep. 30, 2018
$ / shares
shares
Unvested at beginning of period (in shares) | shares 150,000
Unvested at beginning of period (in dollars per share) | $ / shares $ 0.51
Granted (in shares) | shares 200,000
Granted, weighted average grant-date fair value (in dollars per share) | $ / shares $ 0.37
Vested (in shares) | shares (200,000)
Vested, weighted average grant-date fair value (in dollars per share) | $ / shares $ 0.47
Forfeited (in shares) | shares (50,000)
Forfeited, weighted average grant-date fair value (in dollars per share) | $ / shares $ 0.36
Unvested at end of period (in shares) | shares 100,000
Unvested at end of period (in dollars per share) | $ / shares $ 0.37