Annual report pursuant to Section 13 and 15(d)

Significant Customers and Geographic Data Property and Equipment by Region (Details)

v3.19.1
Significant Customers and Geographic Data Property and Equipment by Region (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property and equipment, net of depreciation $ 545 $ 911
Geography Concentration Risk [Member] | Property, Plant and Equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, net of depreciation 545 911
Geography Concentration Risk [Member] | Property, Plant and Equipment | North America    
Property, Plant and Equipment [Line Items]    
Property and equipment, net of depreciation 515 855
Geography Concentration Risk [Member] | Property, Plant and Equipment | Europe    
Property, Plant and Equipment [Line Items]    
Property and equipment, net of depreciation $ 30 $ 56