Annual report pursuant to Section 13 and 15(d)

Impairment of Property and Equipment - Additional Information (Details)

v3.10.0.1
Impairment of Property and Equipment - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Property Plant And Equipment [Line Items]    
Impairment of property and equipment $ 686 $ 793
Puerto Rico and the U S Virgin Islands    
Property Plant And Equipment [Line Items]    
Impairment of property and equipment   800
Revenues related to contracts   $ 900