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Note 2 - Certificates of Deposit
 12 Months Ended
Dec. 31, 2020
Notes to Financial Statements  
Certificates Of Deposit Disclosure[Text Block]
Note
2:
 
 
 
Certificates of Deposit
 
The Company has certificates of deposit for investment purposes. Certificates of deposit have maturities greater than 
three
 months when purchased, in amounts 
not
 greater than 
$250,000.
 All certificates of deposit are held until maturity and recorded at cost which approximates fair value. Certificates of deposit matured through the
fourth
quarter of
2020.
Total certificates of deposit were
$0
and
$2,697,000
as of
December 31, 2020
and
2019,
respectively. Purchases of certificates of deposit were
$1,985,920
and
$2,456,000
for the years ended
December 31, 2020
and
2019,
respectively. Proceeds from the maturity of certificates of deposit were
$4,682,920
and
$3,854,000
for the years ended
December 31, 2020
and
2019,
respectively.