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Commitments and Contingencies - Additional Information (Detail)
£ in Thousands, € in Millions
May 03, 2018
USD ($)
Sep. 08, 2014
complaint
May 16, 2014
patent
Jun. 30, 2018
EUR (€)
ft²
Jun. 30, 2018
USD ($)
ft²
Jun. 30, 2018
GBP (£)
ft²
Loss Contingencies [Line Items]            
Annual base rent         $ 1,000,000  
Tenant improvement allowances         1,000,000  
Unamortized lease incentives         800,000  
Revolving Credit Facility | Line of Credit            
Loss Contingencies [Line Items]            
Maximum borrowing capacity $ 10,000,000          
Interest rate floor 4.50%          
Minimum unrestricted cash and unused borrowing capacity $ 15,000,000          
Adjusted quick ratio requirement 1.75          
Borrowings outstanding         0  
Revolving Credit Facility | Prime Rate | Line of Credit            
Loss Contingencies [Line Items]            
Basis spread on variable rate 0.25%          
A2iA Group II, S.A.S. | France            
Loss Contingencies [Line Items]            
Annual base rent       € 0.4 400,000  
A2iA Group II, S.A.S. | United States            
Loss Contingencies [Line Items]            
Annual base rent         300,000  
IDchecker            
Loss Contingencies [Line Items]            
Annual base rent       € 0.2 200,000  
Other current liabilities            
Loss Contingencies [Line Items]            
Unamortized lease incentives         100,000  
Other non-current liabilities            
Loss Contingencies [Line Items]            
Unamortized lease incentives         $ 700,000  
Building            
Loss Contingencies [Line Items]            
Amended office space subject to the lease (in square feet) | ft²       28,791 28,791 28,791
Sales Office            
Loss Contingencies [Line Items]            
Annual base rent         $ 83,000 £ 63
RMII Patent Infringement Case            
Loss Contingencies [Line Items]            
Number of patents allegedly infringed (in patents) | patent     4      
Number of additional claims filed (in complaints) | complaint   3