WARRANTS Outstanding Warrants (Detail)	Dec. 31, 2012	Dec. 31, 2010
Class of Warrant or Right [Line Items]
Warrants Outstanding	4,638,146
Warrants Vested	4,638,146
Range One
Class of Warrant or Right [Line Items]
Exercise Price (usd per share)	4.00	4.00
Warrants Outstanding	2,023,250
Warrants Vested	2,023,250
Weighted Average Remaining Life	2 years 7 months 21 days
Range Two
Class of Warrant or Right [Line Items]
Exercise Price (usd per share)	5.50	5.50
Warrants Outstanding	2,246,780
Warrants Vested	2,246,780
Weighted Average Remaining Life	3 years 4 months 24 days
Range Three
Class of Warrant or Right [Line Items]
Exercise Price (usd per share)	9.25
Warrants Outstanding	210,000
Warrants Vested	210,000
Weighted Average Remaining Life	4 years 2 months 16 days
Range Four
Class of Warrant or Right [Line Items]
Exercise Price (usd per share)	12.65
Warrants Outstanding	158,116
Warrants Vested	158,116
Weighted Average Remaining Life	6 years 10 months 24 days