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Note 4 - Financing Arrangements (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
March 31,
   
December 31,
 
   
2021
   
2020
 
Real estate term notes bearing interest at one-month LIBOR + 2.00% (2.25% and 4.3% as of March 31, 2021 and December 31, 2020, respectively) maturing June 15, 2022 with monthly payments of approximately $41 plus interest secured by substantially all assets.
  $
946
    $
1,071
 
                 
                 
Promissory Note
   
6,077
     
6,077
 
                 
     
7,023
     
7,148
 
Debt issuance Costs
   
(64
)    
(79
)
Total long-term debt
   
6,959
     
7,069
 
Current maturities of long-term debt
   
(1,964
)    
(1,204
)
Long-term debt - net of current maturities
  $
4,995
    $
5,865