Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details)

v3.21.1
Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Gross Carrying Amount $ 4,547 $ 4,530
Accumulated Amortization (3,705) (3,655)
Finite-Lived Intangible Assets, Net $ 842 875
Patent [Member]    
Weighted Average Amortization Period (Years) 12 years 6 months  
Gross Carrying Amount $ 746 742
Accumulated Amortization (339) (334)
Finite-Lived Intangible Assets, Net $ 407 408
Software [Member]    
Weighted Average Amortization Period (Years) 3 years  
Gross Carrying Amount $ 431 418
Accumulated Amortization (411) (411)
Finite-Lived Intangible Assets, Net $ 20 7
Customer Relationships [Member]    
Weighted Average Amortization Period (Years) 10 years  
Gross Carrying Amount $ 3,370 3,370
Accumulated Amortization (2,955) (2,910)
Finite-Lived Intangible Assets, Net $ 415 $ 460