Organization and Summary of Significant Accounting Policies (Details)
$ in Thousands
6 Months Ended
Jan. 01, 2018
USD ($)
Aug. 14, 2017
Jun. 30, 2018
USD ($)
segment
item
Dec. 31, 2017
USD ($)
Jun. 30, 2017
USD ($)
Ownership percentage     100.00%    
Cash and cash equivalents     $ 1,737 $ 1,538  
Cash and cash equivalents in bank accounts of subsidiaries outside the U.S.     1,100    
Inventory          
Finished Goods     730 721  
Raw Materials     62 50  
Total     $ 792 771  
Revenue recognition          
Period the benefits of the incremental costs of obtaining a contract with customer must exceed to be recognized as an asset     1 year    
Amount of sales commissions to be capitalized     $ 0   $ 0
Capitalized costs to obtain a contract     $ 0 0  
Concentration of Credit Risk and Fair Value of Financial Instruments          
Number of financial institutions in which the company maintains its cash and cash equivalents in the US | item     1    
Cash and cash equivalents held in foreign countries that is not insured     $ 1,100    
Business Segments          
Number of operating segments | segment     1    
Reclassifications          
Reverse stock split ratio   0.25      
Minimum          
Revenue recognition          
Maintenance Support Contract Term     1 year    
Maximum          
Revenue recognition          
Maintenance Support Contract Term     5 years    
ASU 2014-09          
Recent Adopted Accounting Pronouncements          
Change to opening retained earnings $ 0        
Cumulative effect of adoption $ 0        
Revolving Facility          
Amount outstanding under the credit facility     $ 1,100 1,300  
Unused availability     $ 2,400 $ 2,500