Quarterly report pursuant to Section 13 or 15(d)

Supplementary Information For Statement of Cash Flows (Details)

v3.19.1
Supplementary Information For Statement of Cash Flows (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Supplementary Information For Statement of Cash Flows        
Cash and cash equivalents $ 3,916 $ 6,372 $ 9,169  
Restricted cash 7,460 7,458 7,458  
Total $ 11,376 $ 13,830 $ 16,627 $ 11,437