Earnings (Loss) Per Common Share - Computation of Earnings per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Basic
Net loss	$ (3,766)	$ (5,425)	$ (6,870)
Less: Preferred dividends and accretion of discount on preferred stock	(328)	(425)	(410)
Less: Net loss allocated to unvested share-based payment awards		34	29
Earnings (loss) available to common stockholders	866	(5,850)	(7,280)
Weighted average common shares outstanding including unvested share-based payment awards	6,317,032	825,376	822,262
Less: Unvested share-based payment awards	(2,331)	(4,801)	(3,304)
Average shares	6,314,701	820,575	818,958
Basic earnings ( loss) per common share	$ 0.14	$ (7.09)	$ (8.85)
Diluted
Net earnings (loss) allocated to common stockholders	$ 866	$ (5,816)	$ (7,251)
Weighted average common shares outstanding for basic earnings (loss) per common share	6,314,701	820,575	818,958
Add: Dilutive effects of assumed exercises of stock options	948
Add: Dilutive effects of assumed exercises of stock warrant
Average shares and dilutive potential common shares	6,315,649	820,575	818,958
Diluted earnings (loss) per common share	$ 0.14	$ (7.09)	$ (8.85)

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2646-109256

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