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Note 16 - Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
    Fair Value as of December 31, 2019
(In thousands)   Level 1   Level 2   Level 3   Total
Assets (Liabilities):                                
Interest rate swap agreements   $
-
     $
(603
 )   $
-
     $
(603
 )
    Fair Value as of December 31, 2018
(In thousands)   Level 1   Level 2   Level 3   Total
Assets (Liabilities):                                
Interest rate swap agreements   $
-
     $
(170
 )   $
-
     $
(170
 )