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Note 1 - Nature of Business and Basis of Presentation (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
 
 
As reported
   
Adoption of ASC
      Balance  
 
 
December 31,
2018
   
842 - increase
(decrease)
     
January 1,
2019
 
Operating lease right-of-assets
  $
-
    $
602,937
    $
602,937
 
Prepaid expenses and other
  $
150,811
    $
(12,595
)   $
138,216
 
Total assets
  $
11,692,332
    $
590,342
    $
12,282,674
 
Operating lease liabilities, current portion
  $
-
    $
135,519
    $
135,519
 
Operating lease liabilities, net of current portion
  $
-
    $
454,823
    $
454,823
 
Total liabilities
  $
1,226,110
    $
590,342
    $
1,816,452
 
Total liabilities and stockholders’ equity
  $
11,692,332
    $
590,342
    $
12,282,674