Concentration risk number of customers exceeding threshold

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Extended line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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- Definition

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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- Definition

Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Describes the nature of the product warranty, including the approximate term of the product warranty, how the product warranty arose, and the events or circumstances that would require the warrantor to perform under the product warranty.

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Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($) Customer	Sep. 30, 2015 USD ($) Customer	Sep. 30, 2016 USD ($) Business Customer	Sep. 30, 2015 USD ($) Customer	Dec. 31, 2015 USD ($) Customer
Summary Of Significant Accounting Policies [Line Items]
Number of business activities \| Business			1
Cash held in foreign banks	$ 4,000,000		$ 4,000,000		$ 5,200,000
Money market funds	24,200,000		24,200,000		36,600,000
Restricted cash	906,000		906,000		906,000
Write down of inventory	1,100,000	$ 500,000	$ 2,759,000	$ 2,071,000
Standard product warranty, Description			Limited one- to five-year warranty
Impairment charges			$ 0
Provision for income taxes	448,000	269,000	1,040,000	566,000
Interest or penalties recognized	0	0	$ 0	0
RSU's [Member]
Summary Of Significant Accounting Policies [Line Items]
Vesting term			4 years
Foreign Tax Authority [Member]
Summary Of Significant Accounting Policies [Line Items]
Provision for income taxes	0	$ 0	$ 0	$ 0
Letter of Credit [Member]
Summary Of Significant Accounting Policies [Line Items]
Restricted cash	600,000		600,000		600,000
Certificate of Deposit [Member]
Summary Of Significant Accounting Policies [Line Items]
Restricted cash	$ 300,000		$ 300,000		$ 300,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment			3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of property and equipment			5 years
Customer Concentration Risk [Member] \| Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of customers accounted more than 10% concentration risk \| Customer	0		0
Customer Concentration Risk [Member] \| Minimum Threshold For Disclosure [Member] \| Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%	10.00%
Number of customers accounted more than 10% concentration risk \| Customer		0		0
Credit Concentration Risk [Member] \| Minimum Threshold For Disclosure [Member] \| Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage			10.00%		10.00%
Number of customers accounted more than 10% concentration risk \| Customer			0		0