SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	4 Months Ended	12 Months Ended
	Dec. 31, 2012 Segment	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010
Cash and Cash Equivalents [Abstract]
Maximum maturity period for investments considered as highly liquid investments	3 months
Short-term Investments [Abstract]
Short-term duration government fund	$ 22,100,000	$ 15,300,000
Prepaid Expenses and Other [Abstract]
Period within which prepaid expenses consists primarily of advance payments to vendors will be expensed	1 year
Debt Instrument [Line Items]
Loan with HealthCare Royalty Partners	Note payable consists of the Company's loan agreement with HealthCare Royalty Partners ("HC Royalty"), as lender, under which the Company agreed to borrow $50 million in two $25 million tranches. The Company received the first tranche in the amount of $25 millionin December 2012. The loan bears interest at an annual fixed rate of 10.75% of outstanding principal and includes a synthetic royalty component based on net product sales in a calendar year.
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	20 years
Fixed Assets [Abstract]
Useful life of significant additions and improvements in fixed assets for capitalization	greater than one
Segment Information [Abstract]
Number of operating segments	1
Income taxes [Abstract]
Accrued interest and penalties related to uncertain tax positions	0
Advertising Expense [Abstract]
Advertising expense	1,300,000	2,500,000
Potentially dilutive securities [Abstract]
Warrants to purchase common stock (in shares)	4,563	5,188	7,019
Options to purchase common stock (in shares)	7,791	6,125	3,581
Total potentially dilutive securities (in shares)	12,354	11,313	10,600
Operating earnings per share basic and diluted (in dollars per share)	$ (0.37)	$ (0.80)	$ (1.15)	$ (0.85)
Out license [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	16 years
IP license for RP103 and RP104 [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets	20 years
Loan Agreement with HC Royalty [Member]
Debt Instrument [Line Items]
Total amount of loan	50,000,000
Number of tranches in loan	2
Amount of loan per tranche	$ 25,000,000
Annual fixed interest rate (in hundredths)	10.75%