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Note 15 - Warehouse Credit Facilities (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Line of Credit Facilities [Table Text Block]
         
December 31, 2020
 
   
Current
   
Maximum
     
Carrying
 
   
Maturity
   
Capacity
     
Value
 
                     
Facility A - LIBOR plus 1.60%  
January 11, 2021
  $
275,000
    $
167,004
 
Facility B - SOFR plus 1.70%  
On demand
   
125,000
     
51,014
 
   
 
  $
400,000
    $
218,018