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Intangible Assets, net (Tables)
12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets
The following table summarizes our major classes of intangible assets (in thousands):
 December 31,
 20212020
Patents$189 $219 
Accumulated amortization - Patents(106)(94)
Intangibles, net$83 $125