Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounting Policies [Line Items]
Allowance for bad debt	$ 161	$ 144
Depreciation Expense	1,401	1,284	1,107
Impairment charges	0	0	0
Cash Insured amount	250
Uninsured cash balances	1,889	70
Research and development costs	2,457	1,571	1,173
Advertising costs	$ 517	$ 475	$ 194
Credit Concentration Risk [Member]
Accounting Policies [Line Items]
Number of customers accounted for total company's accounts receivable	2	0
Credit Concentration Risk [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Risk percentage		10.00%
Customer Revenue Concentration Risk [Member]
Accounting Policies [Line Items]
Number of customers accounted for total company's revenue	1	0	1
Customer Revenue Concentration Risk [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Risk percentage	11.00%	10.00%	11.00%
Supplier Concentration Risk [Member]
Accounting Policies [Line Items]
Number of suppliers accounted for total company's purchases	0	0	0
Supplier Concentration Risk [Member] \| Minimum [Member]
Accounting Policies [Line Items]
Risk percentage	10.00%	10.00%	10.00%
Customer One Concentration Risk [Member] \| Credit Concentration Risk [Member]
Accounting Policies [Line Items]
Risk percentage	15.00%
Customer Two Concentration Risk [Member] \| Credit Concentration Risk [Member]
Accounting Policies [Line Items]
Risk percentage	13.00%

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Number Of Customers Accounted As Percentage Of Accounts Receivable

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- Definition

Number Of Customers Accounted For Revenues

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- Definition

Number Of Suppliers Accounted On Percentage Of Purchases

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 720

-SubTopic 35

-Section 50

-Paragraph 1

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

-Paragraph 4

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.4)

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The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

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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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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

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-Name Accounting Principles Board Opinion (APB)

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- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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