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Significant Risk Concentrations - Additional Information (Detail) (USD $)
 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2014
Agreement
Dec. 31, 2013
Jun. 30, 2014
Cost of revenue- service [Member]
Jun. 30, 2013
Cost of revenue- service [Member]
Jun. 30, 2014
Cost of revenue- service [Member]
Jun. 30, 2013
Cost of revenue- service [Member]
Jun. 30, 2014
Reduction in marketing expense in the future [Member]
Jun. 30, 2014
Reduction in marketing expense in the future [Member]
Dec. 31, 2013
Future Electronics, Inc. [Member]
Dec. 31, 2013
Mitsubishi Electric Corporation [Member]
Jun. 30, 2014
Credit Concentration Risk [Member]
Other customer [Member]
Accounts receivable [Member]
Customer
Dec. 31, 2013
Credit Concentration Risk [Member]
Other customer [Member]
Accounts receivable [Member]
Customer
Jun. 30, 2014
Credit Concentration Risk [Member]
Other customer [Member]
Accounts receivable [Member]
Minimum [Member]
Dec. 31, 2013
Credit Concentration Risk [Member]
Other customer [Member]
Accounts receivable [Member]
Minimum [Member]
Dec. 31, 2013
Credit Concentration Risk [Member]
Future Electronics, Inc. [Member]
Accounts receivable [Member]
Dec. 31, 2013
Credit Concentration Risk [Member]
Mitsubishi Electric Corporation [Member]
Accounts receivable [Member]
Jun. 30, 2014
Customer Concentration Risk [Member]
Other customer [Member]
Revenue [Member]
Customer
Jun. 30, 2013
Customer Concentration Risk [Member]
Other customer [Member]
Revenue [Member]
Customer
Jun. 30, 2014
Customer Concentration Risk [Member]
Other customer [Member]
Revenue [Member]
Customer
Jun. 30, 2013
Customer Concentration Risk [Member]
Other customer [Member]
Revenue [Member]
Customer
Jun. 30, 2014
Customer Concentration Risk [Member]
Other customer [Member]
Revenue [Member]
Minimum [Member]
Jun. 30, 2013
Customer Concentration Risk [Member]
Other customer [Member]
Revenue [Member]
Minimum [Member]
Jun. 30, 2014
Customer Concentration Risk [Member]
Other customer [Member]
Revenue [Member]
Minimum [Member]
Jun. 30, 2013
Customer Concentration Risk [Member]
Other customer [Member]
Revenue [Member]
Minimum [Member]
Concentration Risk [Line Items]                                                
Number of other customer account as major customer                     0 0         0 0 0 0        
Concentration risk, percentage                         10.00% 10.00% 23.00% 18.00%         10.00% 10.00% 10.00% 10.00%
Accounts receivable $ 11,235,000 $ 15,893,000             $ 3,700,000 $ 2,800,000                            
Expiration date one of OEM Distribution agreements for embedded operating systems Jun. 30, 2016                                              
Number of OEM Distribution agreements for embedded operating systems 2                                              
Expiration date of OEM Distribution agreements for mobile operating systems, non-EMEA Jun. 30, 2015                                              
Number of OEM Distribution agreements for mobile operating systems 4                                              
Earnings under the rebate program     $ 105,000 $ 349,000 $ 169,000 $ 569,000 $ 245,000 $ 394,000