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Summary of Stock Option Activity (Detail) - $ / shares	1 Months Ended	9 Months Ended
	Jan. 31, 2015	Sep. 30, 2015
Shares
Beginning Balance	3,332,617	3,332,617
Granted	304,000	454,000
Exercised		(95,574)
Options forfeited/cancelled		(348,718)
Ending Balance		3,342,325
Weighted Average Exercise Price
Beginning Balance	$ 5.79	$ 5.79
Granted		3.23
Exercised		1.80
Options forfeited/cancelled		4.42
Ending Balance		$ 5.70

X

- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(1)(iv)(3)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

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Number of options outstanding, including both vested and non-vested options.

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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