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Intangible Assets (Tables)
3 Months Ended
Mar. 31, 2023
Intangible Assets  
Schedule of intangible assets

    

March 31, 2023

    

December 31, 2022

Gross Carrying

Accumulated

Gross Carrying

Accumulated

    

Amount

    

Amortization

    

Amount

    

Amortization

Intangible assets:

Licenses

$

149

$

(54)

$

149

$

(51)

Patents

72

(2)

Patents pending

 

1,038

 

 

984

 

Trademarks

9

9

Trademarks pending

 

17

 

 

17

 

Total amortized intangible assets

$

1,285

$

(56)

$

1,159

$

(51)

Schedule of amortization expense for intangible assets

Three Months Ended March 31, 

 

2023

    

2022

 

Amortization expense

$

5

$

2