FAIR VALUE MEASUREMENT (Tables)

4 Months Ended

Dec. 31, 2012

FAIR VALUE MEASUREMENT [Abstract]

Assets and liabilities measured at fair value on a recurring basis

Determining which category an asset or liability falls within the hierarchy requires significant judgment.  The Company evaluates its hierarchy disclosures each reporting period. Assets and liabilities measured at fair value on a recurring basis at December 31, 2012, August 31, 2012 and 2011 are summarized as follows:

Assets	Level 1		Level 2		Level 3		December 31, 2012
Cash equivalents	$	35,069	$	0	$	0	$	35,069
Short-term investments		22,096		0		0		22,096
Total	$	57,165	$	0	$	0	$	57,165
Liabilities
Common stock warrants	$	0	$	0	$	16,405	$	16,405
Total	$	0	$	0	$	16,405	$	16,405
Assets	Level 1		Level 2		Level 3		August 31, 2012
Cash equivalents	$	13,162	$	0	$	0	$	13,162
Short-term investments		15,307		0		0		15,307
Total	$	28,469	$	0	$	0	$	28,469
Liabilities
Common stock warrants	$	0	$	0	$	17,266	$	17,266
Total	$	0	$	0	$	17,266	$	17,266
Assets	Level 1		Level 2		Level 3		August 31, 2011
Cash equivalents	$	13,856	$	0	$	0	$	13,856
Short-term investments		0		0		0		0
Total	$	13,856	$	0	$	0	$	13,856
Liabilities
Common stock warrants	$	0	$	0	$	23,575	$	23,575
Total	$	0	$	0	$	23,575	$	23,575

Activity of the warrant liabilities

The following table presents a reconciliation of the activity for liability-classified common stock warrants, the Company's recurring fair value measurements categorized within level three of the fair value hierarchy:

Fair value as of September 1, 2010	$	15,780
Change in fair value recognized in earnings		16,301
Exercises		(8,506	)
Fair value as of August 31, 2011		23,575
Change in fair value recognized in earnings		3,173
Exercises		(9,482	)
Fair value as of August 31, 2012		17,266
Change in fair value recognized in earnings		1,484
Exercises		(2,345	)
Fair value as of December 31, 2012	$	16,405