Annual report pursuant to Section 13 and 15(d)

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

v3.20.1
Permit and Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Balance $ 8,443 $ 8,419
PCB permit amortized [1] (7) (55)
Permit in progress 354 79
Balance $ 8,790 $ 8,443
[1] Amortization for the one definite-lived permit capitalized in 2009 and was fully amortized in the first quarter of 2019. This permit was amortized over a ten-year period in accordance with its estimated useful life.