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Summary of Significant Accounting Policies (Narrative) (Details)
 12 Months Ended
Dec. 31, 2018
USD ($)
Segment
Dec. 31, 2017
USD ($)
Jan. 01, 2019
USD ($)
Jan. 01, 2018
USD ($)
Summary Of Significant Accounting Policies [Line Items]        
Cumulative effect adjustment to accumulated deficit $ (277,373,000) $ (281,124,000)    
Working capital deficit 2,500,000      
cash flows from operating activities 7,470,000 1,182,000    
Cash and cash equivalents 4,268,000 $ 2,109,000    
Intangible assets impairment charges 0      
Goodwill impairment charges $ 0      
Corporate income tax rate 21.00% 35.00%    
Payment of contingent consideration $ 2,617,000 $ 897,000    
Selling, General and Administrative Expenses [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Advertising and promotion expense $ 800,000 $ 500,000    
ASC 606 [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Number of reporting segment | Segment 1      
Percentage of service revenue that is recognized over a period of time against total revenue 4.00%      
Deferred revenue $ 795,000      
ASU 2016-02 [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Right of use assets     $ 1,100,000  
Operating lease liability     $ 1,200,000  
Difference Between Revenue Guidance in Effect Before and After Topic 606 [Member] | ASC 606 [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Cumulative effect adjustment to accumulated deficit       $ 0
NLEX [Member]        
Summary Of Significant Accounting Policies [Line Items]        
Fair value of liabilities 0      
Payment of contingent consideration $ 2,600,000