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Summary of Significant Accounting Policies (Details 9) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Revenue    
License fees $ 7,954 $ 8,684
Sensor modules 227 814
Non-recurring engineering 357 743
Total Revenues 8,538 10,241
ASSETS    
Accounts receivable and unbilled revenues, net 1,830 1,010
Liabilities    
Deferred revenues 75 1,248
Equity    
Accumulated deficit (185,222) $ (183,745)
Balances excluding revenue standard [Member]    
Revenue    
License fees 7,889  
Sensor modules 227  
Non-recurring engineering 357  
Total Revenues 8,473  
ASSETS    
Accounts receivable and unbilled revenues, net 320  
Liabilities    
Deferred revenues 213  
Equity    
Accumulated deficit (186,870)  
Impact of Revenue Standard [Member]    
Revenue    
License fees 65  
Sensor modules  
Non-recurring engineering  
Total Revenues 65  
ASSETS    
Accounts receivable and unbilled revenues, net 1,510  
Liabilities    
Deferred revenues (138)  
Equity    
Accumulated deficit $ 1,648