Expiration date of original equipment manufacturers distribution agreements for embedded operating systems one.

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Number of customer account as major customer.

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Number of original equipment manufacturers distribution agreements for embedded operating systems.

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Number of original equipment manufacturers distribution agreements for mobile operating systems.

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Original equipment manufacturers distribution agreement mobile operating systems expiration date one.

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Original equipment manufacturers distribution agreements for embedded operating systems renewal description.

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Original equipment manufacturers distribution agreements for mobile operating systems renewal description.

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- Definition

Percentage of allocated rebate values.

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Rebate credits outstanding.

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Revenue recognition under rebates program.

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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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Significant Risk Concentrations - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) Customer Agreement	Dec. 31, 2015 USD ($) Customer	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)
Concentration Risk [Line Items]
Accounts receivable	$ 21,579,000	$ 19,009,000	$ 19,808,000	$ 19,377,000	$ 21,323,000	$ 15,560,000	$ 15,418,000	$ 13,490,000
Expiration date one of OEM Distribution agreements for embedded operating systems	Jun. 30, 2017
Number of OEM Distribution agreements for embedded operating systems \| Agreement	2
Expiration date of OEM Distribution agreements for mobile operating systems, non-EMEA	Jun. 30, 2017
Number of OEM Distribution agreements for mobile operating systems \| Agreement	4
OEM Distribution agreements for mobile operating systems renewal description	Renewed annually or bi-annually
OEM Distribution agreements for embedded operating systems renewal description	Renewed annually or bi-annually
Rebate credits outstanding	$ 469,000
Cost of revenue- professional engineering service [Member]
Concentration Risk [Line Items]
Allocation of rebate values, percentage	30.00%
Earnings under the rebate program	$ 345,000	326,000
Reduction in marketing expense [Member]
Concentration Risk [Line Items]
Allocation of rebate values, percentage	70.00%
Earnings under the rebate program	$ 1,100,000	800,000
Honeywell International Inc and affiliated entities [Member] \| Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts receivable	$ 7,100,000	$ 6,100,000
Revenue [Member] \| Honeywell International Inc [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	16.00%
Revenue [Member] \| Customer accounted for 10% or more [Member] \| Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of customer account as major customer \| Customer	0	0
Accounts receivable [Member] \| Customer accounted for 10% or more [Member] \| Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Number of customer account as major customer \| Customer	0	0
Accounts receivable [Member] \| Honeywell International Inc and affiliated entities [Member] \| Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	33.00%	32.00%