Annual report pursuant to Section 13 and 15(d)

Property and Equipment (Details Textual)

v3.19.1
Property and Equipment (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]      
Depreciation, Depletion and Amortization $ 380 $ 417 $ 377