Summary of Significant Accounting Policies - Summary of Computation of Net Income Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Numerator:
Net income (loss)	$ 209	$ 8,759	$ 4,373	$ 12,483
Denominator:
Basic weighted-average common shares outstanding	113,449	99,409	112,158	99,184
Effect of dilutive securities:
Stock awards and options	4,936	5,033	5,026	4,976
Warrants	8,746	16,789	8,862	16,843
Diluted weighted-average common shares outstanding	127,131	121,231	126,046	121,003
Basic	$ 0.00	$ 0.09	$ 0.04	$ 0.13
Diluted	$ 0.00	$ 0.05	$ 0.03	$ 0.07