Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Apr. 17, 2007 acre
Commitment And Contingencies [Line Items]
Sale of real property			24.74
Number of physicians under guarantee agreements	2
Expenditure on physician guarantees and recruitment	$ 31	$ 57
Physician Guarantees [Member]
Commitment And Contingencies [Line Items]
Liability related to physician guarantees	$ 122