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Recently Adopted Accounting Pronouncements (Detail Textuals) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2015
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total revenue   $ 5,401,000 $ 5,707,000 $ 12,073,000 $ 12,405,000    
Stockholders' equity   61,182,000   61,182,000   $ 60,534,000  
Costs and expenses   4,260,000 4,234,000 12,036,000 12,049,000    
Provision for income taxes   89,000 456,000 31,000 535,000    
Accrued expenses   1,685,000   1,685,000   1,401,000  
Software licenses              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total revenue   3,449,000 4,233,000 6,582,000 7,732,000    
Software maintenance              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total revenue   $ 1,297,000 1,088,000 $ 3,993,000 3,622,000    
Accounting Standards Update 2014-09              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total revenue     (198,000)   (592,000) (800,000) $ (2,800,000)
Stockholders' equity           900,000 1,200,000
Costs and expenses     (25,000)   (82,000) (100,000) (300,000)
Provision for income taxes     (89,000)   (207,000) (400,000) (1,000,000)
Accrued expenses           200,000 300,000
Deferred tax assets           (300,000) (800,000)
Accounts receivable, net           1,400,000 2,200,000
2015 imaging software license contract | Accounting Standards Update 2014-09              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Consummated license contract $ 4,625,000            
Total revenue             (3,600,000)
2015 imaging software license contract | Accounting Standards Update 2014-09 | Software licenses              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total revenue 4,500,000            
2015 imaging software license contract | Accounting Standards Update 2014-09 | Software maintenance              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total revenue $ 125,000            
DSL royalty contracts | Accounting Standards Update 2014-09              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total revenue     2,000   9,000 (17,000) (39,000)
Minimum license/royalty payment contract | Accounting Standards Update 2014-09              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Total revenue     (200,000)   (600,000) (800,000) 860,000
Unbilled receivables           1,400,000 2,200,000
Stockholders' equity             2,200,000
Sales commissions and other third-party acquisition costs | Accounting Standards Update 2014-09              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Stockholders' equity             (300,000)
Costs and expenses     $ (26,000)   $ (81,000) $ (114,000) $ (294,000)