The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of capitalized costs incurred in the period to renew or extend the term of a recognized finite-lived (amortizing and amortizable) intangible asset.

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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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Patents and Trademark - Additional Information (Detail)	3 Months Ended		9 Months Ended
Patents and Trademark - Additional Information (Detail)	Sep. 30, 2015 USD ($) Patents	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Patents	Sep. 30, 2014 USD ($)
Patents and Trademark
Finite-Lived Intangible Assets [Line Items]
Amortization method			Straight-line basis
Capitalized patent costs and trademarks \| $	$ 0	$ 0	$ 0	$ 0
Amortization expense \| $	$ 4,203	$ 3,277	$ 12,608	$ 9,831
Patents and Trademark \| Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated lives of intangible assets			17 years
Patents and Trademark \| Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated lives of intangible assets			20 years
Patents
Finite-Lived Intangible Assets [Line Items]
Number of patents	20		20
Number of pending applications for patents	4		4
Amortization method			Straight-line basis
Patents \| Foreign [Member]
Finite-Lived Intangible Assets [Line Items]
Number of pending applications for patents	7		7
Patents \| Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated lives of intangible assets			17 years
Patents \| Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated lives of intangible assets			20 years
Trademark [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated lives of intangible assets			20 years
Amortization method			Straight-line basis