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Stock and Stock-based Compensation - Summary of Stock Option Activity (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Summary of stock option activity
Outstanding, Beginning Balance	25,778	55,855
Options granted
Options exercised	(3,827)	(4,850)
Options forfeited	(5,007)	(11,848)
Options expired		(13,379)
Outstanding, Ending Balance	16,944	25,778
Exercisable, Ending Balance	16,944	25,778
Summary of stock option activity
Weighted Average Exercise Price, Beginning balance	$ 4.23	$ 4.31
Weighted Average Exercise Price, options granted
Weighted Average Exercise Price, Options exercised	$ 4.09	$ 4.09
Weighted Average Exercise Price, Options forfeited	$ 5.11	$ 4.82
Weighted Average Exercise Price, Options expired		$ 4.09
Weighted Average Exercise Price, Ending balance	$ 4.09	$ 4.23
Weighted Average Exercise Price, Exercisable	$ 4.09	$ 4.23

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the 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)(iii)

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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-Publisher FASB

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-Section 50

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(4)

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- 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

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

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-Topic 718

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

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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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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 of the plan that expired.

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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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