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Note 8 - Intellectual Property
12 Months Ended
Dec. 31, 2021
Notes to Financial Statements  
Intangible Assets Disclosure [Text Block]

8.

Intellectual Property

 

Intellectual property, net, is comprised of the following (in thousands):

 

  

2021

  

2020

 

Intellectual property

 $1,794  $1,794 

Accumulated amortization

  (1,154)  (975)

Intellectual property, net

 $640  $819 

 

Aggregate amortization expense for both of the years ended December 31, 2021 and December 31, 2020 was $0.2 million.

 

Estimated future amortization is as follows as of December 31, 2021 (in thousands):

 

2022

 $179 

2023

  179 

2024

  135 

2025

  70 

2026

  51 

Thereafter

  26 

Total estimated future amortization

 $640