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Note 3 - Restricted Cash (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Restrictions on Cash and Cash Equivalents [Table Text Block]
  

December 31,

 
  

2021

  

2020

 
         

Insurance premium escrow

 $-  $280,269 
  

December 31,

 
         
  

2021

  

2020

 
         

Cash and cash equivalents

 $72,508,528  $44,665,972 

Funds held as collateral

  9,185,872   10,006,075 

Restricted cash

  -   280,269 
         

Total Cash, Cash Equivalents, and Restricted Cash as Presented in the Consolidated Statements of Cash Flows

 $81,694,400  $54,952,316