General form of registration statement for all companies including face-amount certificate companies

Note 4 - Stockholders' Equity - Summary of Stock Option Activity (Details)

v3.19.2
Note 4 - Stockholders' Equity - Summary of Stock Option Activity (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Options Outstanding (in shares) 81,633 94,704 94,704  
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 215.60 $ 395.20 $ 395.20  
Weighted- average remaining contractual life (Year) 6 years 146 days   5 years 36 days 4 years 255 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 40,000 0 24,432  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 8.60   $ 22.60  
Options Outstanding (in shares) 121,633   81,633 94,704
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 147.40   $ 215.60 $ 395.20
Aggregate intrinsic value $ 19,040   $ 108,000
Options Exercisable (in shares) 89,789   58,306  
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 195.60   $ 291.80  
Options Exercisable, Weighted Average Remaining Contractual Life (Year) 5 years 109 days   4 years 146 days  
Options Exercisable, Aggregate Intrinsic Value $ 5,712