Income (Loss) Per Common Share - Additional Information (Detail)	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share Disclosure [Line Items]
Potential common stock shares issuable	382,675	237,786	382,675	237,786
Antidilutive Securities Excluded From Computation Of Earnings Per Share Shares	977,846	625,349	977,846	672,807

These are options which are excluded from the computation of diluted earnings per share as they were anti-dilutive due to their exercise price being in excess of the average close price for the period ended or they were not yet vested.

No definition available.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration