Summary of Significant Accounting Policies - Acc Liab (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2015
Other Accrued Liabilities
Accrued contract payments	$ 1,980	$ 4,202	$ 5,830
Accrued clinical trial costs	4,700	3,096	1,735
Accrued professional services	865	1,028	788
Accrued employee benefits	676	640	567
Accrued public reporting charges	156	192	192
Accrued interest on convertible senior notes	2,388	138
Other current accrued liabilities	385	417	1,329
Total	$ 11,150	$ 9,713	$ 10,441