Revenue from contracts with customers.

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- Definition

Term of engagements.

+ References

No definition available.

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- Definition

Costs incurred and are directly related to generating contract revenues.

+ References

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- Definition

Amount of the cumulative effect on retained earnings net of related income tax effect.

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- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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- Definition

The aggregate total amount of expenses directly related to the marketing or selling of products or services.

+ References

No definition available.

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Revenue from Contracts with Customers - Aditional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenue from Contracts with Customers [Line Items]
Adjustment to deferred revenue and accumulated deficit	$ 5,703
Deferred revenue	635		$ 6,141
Contract cost	200
Sales and marketing	419	$ 379
Prepaid expenses and other current assets	$ 2,675		3,467
Minimum [Member]
Revenue from Contracts with Customers [Line Items]
Engagement term	3 months
Maximum [Member]
Revenue from Contracts with Customers [Line Items]
Engagement term	6 months
Product [Member]
Revenue from Contracts with Customers [Line Items]
Adjustment to deferred revenue and accumulated deficit	$ 5,703
Deferred revenue	226		5,888
Service [Member]
Revenue from Contracts with Customers [Line Items]
Deferred revenue	409		$ 253
Topic 606 [Member]
Revenue from Contracts with Customers [Line Items]
Prepaid expenses and other current assets	200
Accordance with Topic 605 [Member] \| Topic 606 [Member] \| Product [Member]
Revenue from Contracts with Customers [Line Items]
Revenue	8,700
Deferred revenue	7,300
Accordance with Topic 605 [Member] \| Topic 606 [Member] \| Service [Member]
Revenue from Contracts with Customers [Line Items]
Sales and marketing	$ 4