Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Note 7 - Other Equity - Stock Option Transactions (Details)

v3.10.0.1
Note 7 - Other Equity - Stock Option Transactions (Details)
6 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Statement Line Items [Line Items]    
Outstanding, Beginning of period 2,344,000 2,005,000
Outstanding, Beginning of period, weighted average exercise price $ 3.46 $ 4.31
Stock options, granted 2,084,000 728,000
Stock options, weighted average exercise price, granted $ 2.96 $ 1.10
Stock options, exercised (77,000)
Stock options, weighted average exercise price, exercised $ 2.31
Stock options, forfeited (17,000) (142,000)
Stock options, weighted average exercise price, forfeited $ 2.01 $ 3.65
Stock options, expired (263,000)
Stock options, weighted average exercise price, expired $ 4.97
Outstanding, end of period 4,334,000 2,328,000
Outstanding, end of period, weighted average exercise price $ 3.16 $ 3.40