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

Note 3 - Fair Value Measurement (Tables)

v3.19.2
Note 3 - Fair Value Measurement (Tables)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Notes Tables    
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
      Level 1       Level 2       Level 3       Total  
Liabilities                                
Liability classified stock purchase warrants   $
-
    $
-
    $
583,734
    $
583,734
 
Balance at December 31, 2018   $
-
    $
-
    $
583,734
    $
583,734
 
                                 
Liability classified stock purchase warrants   $
-
    $
-
    $
923,849
    $
923,849
 
Balance at March 31, 2019   $
-
    $
-
    $
923,849
    $
923,849
 
    Level 1   Level 2   Level 3   Total
Liabilities
               
Liability classified stock purchase warrants   $
-
    $
-
    $
3,852,882
    $
3,852,882
 
Balance at December 31, 2017   $
-
    $
-
    $
3,852,882
    $
3,852,882
 
                                 
Liability classified stock purchase warrants   $
-
    $
-
    $
583,734
    $
583,734
 
Balance at December 31, 2018   $
-
    $
-
    $
583,734
    $
583,734
 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
      Mark-to-market
liabilities - stock
purchase warrants
 
Balance at December 31, 2018   $
583,734
 
Change in fair value - loss    
340,115
 
Balance at March 31, 2019   $
923,849
 
      Mark-to-market
liabilities - stock
purchase warrants
 
Balance at December 31, 2017   $
3,852,882
 
Change in fair value - gain    
(190,219
)
Balance at March 31, 2018   $
3,662,663
 
    Mark-to-market
liabilities - stock
purchase warrants
Balance at December 31, 2017   $
3,852,882
 
Change in fair value - gain    
(3,269,148
)
Balance at December 31, 2018   $
583,734
 
    Mark-to-market
liabilities - stock
purchase warrants
Balance at December 31, 2016   $
3,921,917
 
Issuance of warrants    
2,483,848
 
Exercise of warrants    
(4,023,057
)
Change in fair value - loss    
1,470,174
 
Balance at December 31, 2017   $
3,852,882