Summary of Significant Accounting Policies - Earnings (Loss) Per Common Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic
Net loss	$ (1,909)	$ (435)	$ (3,332)	$ (4,066)
Less: Preferred dividends and accretion of discount on preferred stock	(107)	(107)	(328)	(317)
Plus: Discount on redemption of preferred stock	4,960		4,960
Less: Net income (loss) allocated to unvested share-based payment awards	(1)	3	(1)	27
Earnings (loss) available to common stockholders	2,943	(539)	1,299	(4,356)
Weighted average common shares outstanding including unvested share-based payment awards	7,673,201	825,364	3,113,356	825,368
Less: Unvested share-based payment awards	(2,167)	(4,500)	(2,722)	(5,102)
Average shares	7,671,034	820,864	3,110,634	820,266
Basic earnings (loss) per common share	$ 0.38	$ (0.66)	$ 0.42	$ (5.31)
Diluted
Earnings (loss) available to common stockholders	$ 2,943	$ (539)	$ 1,299	$ (4,356)
Weighted average common shares outstanding for basic earnings (loss) per common share	7,673,201	825,364	3,113,356	825,368
Add: Dilutive effects of assumed exercises of stock options	273		92
Add: Dilutive effects of assumed exercises of stock warrant
Average shares and dilutive potential common shares	7,671,307	820,864	3,110,726	820,266
Diluted earnings (loss) per common share	$ 0.38	$ (0.66)	$ 0.42	$ (5.31)