Distribution partners in Europe, Turkey and Africa distribution agreements expiration date.

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

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Percentage of allocated rebate values.

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Rebate credits outstanding.

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Revenue From Contract With Customer, Percentage On Revenues

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Significant Risk Concentrations - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Concentration Risk [Line Items]
Accounts receivable		$ 8,777,000		$ 8,777,000		$ 11,581,000
Distribution partners in Europe, Turkey and Africa distribution agreements expiration date				Jun. 30, 2019
ODAs windows mobile operating system expiration date	Apr. 30, 2022
Rebate credits outstanding		$ 821,000		$ 821,000
Cost of revenue [Member]
Concentration Risk [Line Items]
Allocation of rebate values, percentage		20.00%	30.00%	20.00%	30.00%
Reduction to marketing expense [Member]
Concentration Risk [Line Items]
Allocation of rebate values, percentage		80.00%	70.00%	80.00%	70.00%
Third Party Software [Member]
Concentration Risk [Line Items]
Percentage of sales from distribution agreements on total revenues				3.70%
Honeywell International Inc and affiliated entities [Member] \| Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts receivable		$ 1,400,000		$ 1,400,000		$ 2,800,000
Honeywell International Inc and affiliated entities [Member] \| Accounts receivable [Member] \| Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage				16.00%		24.00%