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Note 9 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
   
Successor
 
   
December 31,
2020
 
2021
  $
439
 
2022
   
79
 
Total lease payments
   
518
 
Less present value discount
   
(10
)
Present value of lease liabilities
  $
508