Calculations of Basic and Diluted Loss per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share Disclosure [Line Items]
Net income (loss) - basic and diluted	$ (1,586)	$ 1,093	$ (7,717)	$ (107)
Weighted-average shares outstanding - basic	13,619	12,707	13,460	12,758
Effect of dilutive securities:
Stock options		339
Weighted-average shares outstanding - diluted	13,619	13,046	13,460	12,758
Basic income (loss) per common share	$ (0.12)	$ 0.09	$ (0.57)	$ (0.01)
Diluted income (loss) per common share	$ (0.12)	$ 0.08	$ (0.57)	$ (0.01)

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