Related Party Transactions (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Related Party Lease Agreements | General and Administrative Expense | |||
Related Party Transactions (Details) [Line Items] | |||
SG&A expense with related party | $ 74 | $ 52 | $ 46 |