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Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
item
Dec. 31, 2013
Property and equipment    
Depreciation and amortization $ 236us-gaap_DepreciationDepletionAndAmortization $ 147us-gaap_DepreciationDepletionAndAmortization
Risk Concentration    
Number of major U.S. financial institutions with whom cash, cash equivalents and investments are maintained 2intz_NumberOfMajorUnitedStatesFinancialInstitutions  
Number of suppliers from whom certain components may be available 1intz_NumberOfSuppliers  
Accounts Receivable and Allowance for Doubtful Accounts    
Allowance for Doubtful Accounts Receivable $ 0us-gaap_AllowanceForDoubtfulAccountsReceivable $ 0us-gaap_AllowanceForDoubtfulAccountsReceivable
Equipment and furniture and fixtures | Minimum    
Property and equipment    
Estimated useful lives 1 year  
Equipment and furniture and fixtures | Maximum    
Property and equipment    
Estimated useful lives 5 years  
Leasehold improvements | Minimum    
Property and equipment    
Estimated useful lives 2 years  
Leasehold improvements | Maximum    
Property and equipment    
Estimated useful lives 5 years