Significant Risk Concentrations - Additional Information (Detail) (USD $)	3 Months Ended			3 Months Ended						3 Months Ended		12 Months Ended	3 Months Ended	12 Months Ended			3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Cost of revenue - service [Member]	Mar. 31, 2013 Cost of revenue - service [Member]	Mar. 31, 2014 Reduction in marketing expense in the future [Member]	Mar. 31, 2013 Future Electronics, Inc. [Member]	Dec. 31, 2013 Future Electronics, Inc. [Member]	Dec. 31, 2013 Mitsubishi Electric Corporation [Member]	Mar. 31, 2014 Outerwall [Member]	Mar. 31, 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	Mar. 31, 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]	Mar. 31, 2014 Customer Concentration Risk [Member] Other customer [Member] Revenue [Member] Customer	Mar. 31, 2013 Customer Concentration Risk [Member] Other customer [Member] Revenue [Member] Customer	Mar. 31, 2014 Customer Concentration Risk [Member] Other customer [Member] Revenue [Member] Minimum [Member]	Mar. 31, 2013 Customer Concentration Risk [Member] Other customer [Member] Revenue [Member] Minimum [Member]	Mar. 31, 2013 Customer Concentration Risk [Member] Future Electronics, Inc. [Member] Revenue [Member]	Mar. 31, 2014 Customer Concentration Risk [Member] Outerwall [Member] Revenue [Member]
Concentration Risk [Line Items]
Total revenue	$ 22,731,000	$ 20,870,000					$ 2,200,000			$ 2,600,000
Concentration risk, percentage													10.00%	10.00%	23.00%	18.00%			10.00%	10.00%	11.00%	12.00%
Number of other customer account as major customer											0	0					0	0
Accounts receivable	13,130,000		15,893,000					3,700,000	2,800,000
Expiration date one of OEM Distribution agreements for embedded operating systems	Jun. 30, 2014
Expiration date of OEM Distribution agreements for mobile operating systems, non-EMEA	Jun. 30, 2014
Earnings under the rebate program				$ 64,000	$ 220,000	$ 149,000