Revenue Recognition and Accounts Receivable - Summary Information for Accounts Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014
Receivables [Abstract]
Accounts receivable (net of contractual allowances)	$ 11,918		$ 14,972
Less allowance for doubtful accounts	(3,455)	$ (4,487)	(5,347)	$ (5,632)	$ (7,279)	$ (6,903)
Patient accounts receivable - net	$ 8,463		$ 9,625