Quarterly report pursuant to Section 13 or 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
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Property Plant And Equipment [Line Items]        
Impairment of property and equipment $ 271 $ 666 $ 632 $ 666
Puerto Rico and the U S Virgin Islands        
Property Plant And Equipment [Line Items]        
Impairment of property and equipment   700   700
Revenues related to contracts   $ 900   $ 900