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Organization, Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2015
USD ($)
Customer
ServiceProvider
Business_Unit
Institution
Dec. 31, 2014
USD ($)
Customer
ServiceProvider
Dec. 31, 2013
USD ($)
Customer
ServiceProvider
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Experience in operation period 30 years    
Number of customers concentrated | Customer 2 2 3
Number of service providers concentrated | ServiceProvider 1 1 1
Financial institutions to held securities | Institution 2    
Cash and cash equivalents original maturity dates Three months or less    
Bank balances $ 8,500,000 $ 9,900,000  
Inventory components 39,000 97,000  
Costs capitalized $ 0    
Number of operating groups | Business_Unit 2    
Advertising expenses $ 300,000 $ 300,000 $ 400,000
Customer Concentration Risk [Member] | Revenues [Member]      
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Concentration percentage 76.70% 79.20% 77.50%
Customer Concentration Risk [Member] | Accounts receivable [Member]      
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Concentration percentage 83.00% 87.00% 83.00%
Supplier concentration risk [Member] | Accounts payable [Member]      
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Concentration percentage 24.00% 27.00% 28.00%
Graphics [Member]      
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Total sales incentives $ 200,000 $ 500,000 $ 1,200,000
Minimum [Member]      
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of the assets 3 years    
Minimum [Member] | Customer Concentration Risk [Member] | Revenues [Member]      
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Concentration percentage 10.00% 10.00% 10.00%
Minimum [Member] | Supplier concentration risk [Member] | Purchase [Member]      
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Concentration percentage 10.00% 10.00% 10.00%
Maximum [Member]      
Organization Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of the assets 7 years