Computation of Basic and Diluted Net (Loss) Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule For Earning Per Share Basic And Diluted [Line Items]
Numerator for basic and diluted net loss per share	$ (2,505)	[1]	$ (2,094)	[2]	$ (2,908)	$ (3,793)	$ (3,815)	[3]	$ (39,017)	[4]	$ (2,518)	$ (1,856)	$ (11,300)	$ (47,206)	$ (1,900)
Denominator:
Weighted average shares for basic net loss per share													29,486	26,673	23,572
Effect of dilutive securities:
Weighted average of common stock, stock options and warrants
Denominators for diluted net loss per share	33,077	[1]	30,044	[2]	27,804	26,696	26,694	[3]	26,677	[4]	26,669	26,661	29,486	26,673	23,572
Net loss per share-basic													$ (0.38)	$ (1.77)	$ (0.08)
Net loss per share-diluted	$ (0.08)	[1]	$ (0.07)	[2]	$ (0.11)	$ (0.14)	$ (0.14)	[3]	$ (1.46)	[4]	$ (0.09)	$ (0.07)	$ (0.38)	$ (1.77)	$ (0.08)

[1] The quarter ended December 31, 2013 includes one-time cash charges of $1.5 million for the integration of Syndicated, acquisition of Mercury and other acquisition related expenses.

[2] The quarter ended September 30, 2013 includes one-time cash charges of $555,000 for the integration of Syndicated and other acquisition related expenses.

[3] The quarter ended December 31, 2012 includes a noncash charge of $1.6 million for an additional valuation allowance for our net deferred tax assets generated during that quarter.

[4] The quarter ended September 30, 2012 includes a noncash charge of $22.0 million for the impairment of goodwill and other assets and a noncash charge of $14.5 million for the establishment of a valuation allowance for all of our net deferred tax assets.