Annual report pursuant to Section 13 and 15(d)

Permit and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details)

v3.20.1
Permit and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Gross Carrying Amount $ 5,089 $ 5,053
Accumulated Amortization (4,024) (3,768)
Finite-Lived Intangible Assets, Net $ 1,065 1,285
Patent [Member]    
Weighted Average Amortization Period (Years) 11 years  
Gross Carrying Amount $ 760 728
Accumulated Amortization (358) (336)
Finite-Lived Intangible Assets, Net $ 402 392
Software [Member]    
Weighted Average Amortization Period (Years) 3 years  
Gross Carrying Amount $ 414 410
Accumulated Amortization (408) (403)
Finite-Lived Intangible Assets, Net $ 6 7
Customer Relationships [Member]    
Weighted Average Amortization Period (Years) 10 years  
Gross Carrying Amount $ 3,370 3,370
Accumulated Amortization (2,713) (2,491)
Finite-Lived Intangible Assets, Net $ 657 879
Permit [Member]    
Weighted Average Amortization Period (Years) 10 years  
Gross Carrying Amount $ 545 545
Accumulated Amortization (545) (538)
Finite-Lived Intangible Assets, Net $ 7