Net Income Per Share - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Line Items]
Exercisable options outstanding that enable to purchase shares	800,000	800,000	800,000	800,000
Restricted Stock [Member]
Earnings Per Share [Line Items]
Shares with dilutive effect and included in computation of diluted income (loss) per share	5,000	23,000	5,000	23,000
Equity Option [Member]
Earnings Per Share [Line Items]
Shares with dilutive effect and included in computation of diluted income (loss) per share	297,000	196,000	299,000
Options excluded from computation of diluted income (loss) per share due to anti-dilutive effect	345,000	440,000	345,000	1,300,000