STOCK OPTION PLANS (Details) (USD $)	4 Months Ended		12 Months Ended														88 Months Ended
	Dec. 31, 2012		Aug. 31, 2012		Aug. 31, 2011		Aug. 31, 2010		Aug. 31, 2009		Aug. 31, 2008		Aug. 31, 2007		Aug. 31, 2006		Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)	8,900,000																8,900,000
Remaining shares available for issuance (in shares)	1,900,000																1,900,000
Employee stock options vesting periods	4 months
Employee stock options clift-vesting periods	6 years
Maximum period of contractual term of option exercisable	10 years
Employee stock-based compensation expense	$ 2,230,000		$ 4,487,000		$ 1,920,000		$ 217,000										$ 10,067,000
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Risk-free interest rate															5.00%	[1],[2]
Risk-free interest rate, minimum	0.68%	[1]	0.68%	[1]	1.60%	[1]	2.10%	[1]	1.50%	[1]	2.00%	[1]	4.00%	[1]
Risk-free interest rate, maximum	0.70%	[1]	1.20%	[1]	2.40%	[1]	3.10%	[1]	3.20%	[1]	3.75%	[1]	5.00%	[1]
Expected life of stock option	5 years	[1]			6 years	[1]			7 years	[1]	8 years	[1]	8 years	[1]	10 years	[1],[2]
Annual volatility	95.00%	[1]											100.00%	[1]	100.00%	[1],[2]
Annual volatility, minimum			121.00%	[1]	88.00%	[1]	55.00%	[1]	170.00%	[1]	109.00%	[1]
Annual volatility, maximum			125.00%	[1]	116.00%	[1]	245.00%	[1]	240.00%	[1]	128.00%	[1]
Dividend rate (in hundredths)	0.00%
Consultant stock-based compensation expense	9,000		72,000		197,000		78,000										764,000
Option shares
Outstanding beginning balance (in shares)	6,125,000		3,581,000		1,391,000		989,000		907,000		684,000		580,000		0		0
Granted (in shares)	1,759,000		2,722,000		2,232,000		303,000		82,000		223,000		107,000		580,000
Assumed in the 2009 Merger (in shares)							161,000
Exercised (in shares)	(79,000)		(160,000)		(39,000)		(38,000)		0		0		(3,000)		0
Canceled (in shares)	(14,000)		(18,000)		(3,000)		(24,000)		0		0		0		0
Outstanding ending balance (in shares)	7,791,000		6,125,000		3,581,000		1,391,000		989,000		907,000		684,000		580,000		7,791,000
Weighted- average exercise price
Outstanding (in dollars per share)	$ 5.87		$ 6.64		$ 14.25		$ 2.42		$ 2.54		$ 2.63		$ 2.64		$ 0		$ 0
Granted (in dollars per share)	$ 5.36		$ 5.38		$ 3.39		$ 2.29		$ 1.13		$ 2.27		$ 2.56		$ 2.64
Assumed in the 2009 Merger (in dollars per share)							$ 114.12
Exercised (in dollars per share)	$ 2.45		$ 2.28		$ 2.44		$ 1.69		$ 0		$ 0		$ 2.57		$ 0
Canceled (in dollars per share)	$ 6.16		$ 119.27		$ 1,088.33		$ 142.42		$ 0		$ 0		$ 0		$ 0
Outstanding (in dollars per share)	$ 5.79		$ 5.87		$ 6.64		$ 14.25		$ 2.42		$ 2.54		$ 2.63		$ 2.64		$ 5.79
Exercisable
Outstanding (in shares)	2,995,000		1,881,000		1,089,000		826,000		601,000		273,000		4,000		0		0
Granted (in shares)	578,000		1,279,000		835,000		161,000		0		0		0		0
Assumed in 2009 Merger (in shares)							158,000
Exercised (in shares)	0		0		0		0		0		0		0		0
Canceled (in shares)	0		0		0		0		0		0		0		0
Outstanding (in shares)	3,494,000		2,995,000		1,881,000		1,089,000		826,000		601,000		273,000		4,000		3,494,000
Weighted- average fair value of options granted
Outstanding (in dollars per share)	$ 3.37		$ 2.30		$ 1.87		$ 2.40		$ 2.39		$ 2.45		$ 2.47		$ 0		$ 0
Granted (in dollars per share)	$ 3.84		$ 4.62		$ 2.54		$ 1.24		$ 1.04		$ 2.21		$ 2.31		$ 2.47
Assumed in the 2009 Merger (in dollars per share)							$ 2.63
Exercised (in dollars per share)	$ 1.79		$ 1.72		$ 2.02		$ 1.49		$ 0		$ 0		$ 2.40		$ 0
Canceled (in dollars per share)	$ 4.49		$ 0.02		$ 0		$ 2.00		$ 0		$ 0		$ 0		$ 0
Outstanding (in dollars per share)	$ 3.48		$ 3.37		$ 2.30		$ 1.87		$ 2.40		$ 2.39		$ 2.45		$ 2.47		$ 3.48
Weighted average intrinsic values of stock options outstanding and expected to vest	10,000																10,000
Weighted average intrinsic values of stock options exercisable	6,800																6,800
Options outstanding under stock option plans [Abstract]
Options outstanding, number of options outstanding and expected to vest (in shares)	7,791,000																7,791,000
Options outstanding, weighted-average remaining contractual life	8 years 2 months 23 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 5.79																$ 5.79
Options exercisable, number of options exercisable (in shares)	3,494,000																3,494,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 6.80																$ 6.80
Total unrecognized compensation cost	15,500,000																15,500,000
Weighted-average period over which compensation cost expected to be recognized	3 years
Aggregate intrinsic value of options exercised	228,000		602,000		131,000
$ 0 to $1.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 0
Range of exercise prices, maximum (in dollars per share)	$ 1.00
Options outstanding, number of options outstanding and expected to vest (in shares)	9,000																9,000
Options outstanding, weighted-average remaining contractual life	6 years 3 months 14 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 0.85																$ 0.85
Options exercisable, number of options exercisable (in shares)	7,000																7,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.85																$ 0.85
$ 1.01 to $2.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 1.01
Range of exercise prices, maximum (in dollars per share)	$ 2.00
Options outstanding, number of options outstanding and expected to vest (in shares)	79,000																79,000
Options outstanding, weighted-average remaining contractual life	6 years 5 months 16 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 1.78																$ 1.78
Options exercisable, number of options exercisable (in shares)	74,000																74,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 1.76																$ 1.76
$ 2.01 to $3.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 2.01
Range of exercise prices, maximum (in dollars per share)	$ 3.00
Options outstanding, number of options outstanding and expected to vest (in shares)	1,353,000																1,353,000
Options outstanding, weighted-average remaining contractual life	5 years 10 months 20 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 2.66																$ 2.66
Options exercisable, number of options exercisable (in shares)	1,075,000																1,075,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 2.61																$ 2.61
$ 3.01 to $4.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 3.01
Range of exercise prices, maximum (in dollars per share)	$ 4.00
Options outstanding, number of options outstanding and expected to vest (in shares)	1,764,000																1,764,000
Options outstanding, weighted-average remaining contractual life	7 years 10 months 24 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 3.50																$ 3.50
Options exercisable, number of options exercisable (in shares)	1,229,000																1,229,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 3.52																$ 3.52
$ 4.01 to $5.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 4.01
Range of exercise prices, maximum (in dollars per share)	$ 5.00
Options outstanding, number of options outstanding and expected to vest (in shares)	310,000																310,000
Options outstanding, weighted-average remaining contractual life	8 years 10 months 24 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 4.79																$ 4.79
Options exercisable, number of options exercisable (in shares)	87,000																87,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 4.71																$ 4.71
$ 5.01 to $6.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 5.01
Range of exercise prices, maximum (in dollars per share)	$ 6.00
Options outstanding, number of options outstanding and expected to vest (in shares)	3,884,000																3,884,000
Options outstanding, weighted-average remaining contractual life	9 years 1 month 28 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 5.27																$ 5.27
Options exercisable, number of options exercisable (in shares)	899,000																899,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 5.18																$ 5.18
$ 6.01 to $7.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 6.01
Range of exercise prices, maximum (in dollars per share)	$ 7.00
Options outstanding, number of options outstanding and expected to vest (in shares)	278,000																278,000
Options outstanding, weighted-average remaining contractual life	9 years 2 months 1 day
Options outstanding, weighted-average exercise price (in dollars per share)	$ 6.48																$ 6.48
Options exercisable, number of options exercisable (in shares)	66,000																66,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 6.50																$ 6.50
$ 7.01 to $8.00 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 7.01
Range of exercise prices, maximum (in dollars per share)	$ 8.00
Options outstanding, number of options outstanding and expected to vest (in shares)	70,000																70,000
Options outstanding, weighted-average remaining contractual life	9 years 1 month 17 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 7.75																$ 7.75
Options exercisable, number of options exercisable (in shares)	14,000																14,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 7.75																$ 7.75
$ 8.01 to $964.24 [Member]
Options outstanding under stock option plans [Abstract]
Range of exercise prices, minimum (in dollars per share)	$ 8.01
Range of exercise prices, maximum (in dollars per share)	$ 965.00
Options outstanding, number of options outstanding and expected to vest (in shares)	44,000																44,000
Options outstanding, weighted-average remaining contractual life	2 years 8 months 19 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 249.43																$ 249.43
Options exercisable, number of options exercisable (in shares)	43,000																43,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 249.43																$ 249.43
Minimum [Member]
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Expected life of stock option			5 years	[1]			6 years	[1]
Maximum [Member]
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Expected life of stock option			6 years	[1]			7 years	[1]
Selling, General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock-based compensation expense	1,777,000		3,561,000		1,499,000		121,000										8,022,000
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Consultant stock-based compensation expense																	147,000
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock-based compensation expense	453,000		926,000		421,000		96,000										2,045,000
Assumptions of black scholes option pricing model for stock-based compensation expense [Abstract]
Consultant stock-based compensation expense																	617,000
Equity Incentive Plan 2010 [Member]
Weighted- average fair value of options granted
Weighted average intrinsic values of stock options outstanding and expected to vest	$ 10,300,000		$ 6,000,000														$ 10,300,000
Options expected to vest (in shares)	7,644,000		5,930,000														7,644,000
Weighted average remaining contractual life	8 years 2 months 12 days		7 years
Weighted average price per share (in dollars per share)	$ 1.34		$ 1.0														$ 1.34

[1] Dividend rate is 0% for all periods presented.

[2] Employee stock-based compensation expense was recorded on the consolidated statements of operations commencing on September 1, 2006.