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Note 1 - Basis of Presentation and General Information (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Carrying value of net assets of companies sold

  24,074  

Less: Carrying value of net assets of companies acquired

  (3,131) 

Less: Consideration received in cash

  (10,000) 
Less: Settlement of related party payables  (1,150) 

Excess of consideration over acquired assets

  9,793