Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Restricted Cash - Reconciliation of Cash, Cash Equivalents and Restricted Cash Balance (Details)

v3.19.2
Note 4 - Restricted Cash - Reconciliation of Cash, Cash Equivalents and Restricted Cash Balance (Details) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Cash and cash equivalents $ 9,485,212 $ 8,716,874    
Restricted cash 129,220 138,078    
Total cash, cash equivalents and restricted cash $ 9,614,432 $ 8,854,952 $ 4,707,924 $ 4,320,040