Per Share Data - Schedule of Basic and Diluted Earnings Per Share Attributable to Common Stockholders (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Net (loss) income attributable to common stockholders	$ (1,647)	$ 1,607	$ (3,054)	$ 1,687
Add: Impact of assumed conversions Interest on convertible debts		231		223
Net income (loss) attributable to common stockholders after assumed conversions	$ (1,647)	$ 1,838	$ (3,054)	$ 1,910
Denominator:
Weighted average common shares - basic	61,102	59,252	60,427	59,252
Effect of dilutive securities:
Convertible debts		20,700		12,684
Weighted average common shares - diluted		88,434		81,787
(Loss) earnings per share:
Basic	$ (0.03)	$ 0.03	$ (0.05)	$ 0.03
Diluted		$ 0.02		$ 0.02
Series C Convertible Preferred Stock [Member]
Effect of dilutive securities:
Effect of dilutive securities		3,300		3,300
Series D Convertible Preferred Stock [Member]
Effect of dilutive securities:
Effect of dilutive securities		5,182		6,551
Stock Option [Member]
Effect of dilutive securities:
Stock options
Warrant [Member]
Effect of dilutive securities:
Warrants