Convertible Senior Subordinated Notes (Tables)

12 Months Ended

Jun. 30, 2012

Convertible Senior Subordinated Notes [Abstract]

Contractual Interest Expense and Amortization of Debt Issuance Costs and Debt Discount

	2012		2011		2010
Interest expense	$	17	$	17	$	213
Amortization of issuance costs		—		—		118
Amortization of discount		—		—		2,069
Total interest	$	17	$	17	$	2,400