Stockholders' Equity - Stock Option Activity Under Plan (Detail) - 2008 Plan [Member] $ / shares in Units, $ in Thousands	3 Months Ended	4 Months Ended	9 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options Outstanding, Beginning balance | shares			4,981,421
Number of Options, Granted | shares			1,535,300
Number of Options, Exercised | shares			(84,080)
Number of Options Forfeited | shares	(30,200)	(182,700)	(484,950)
Number of Options Outstanding, Ending balance | shares	5,947,691	5,947,691	5,947,691
Number of Options, Outstanding at March 31, 2017 - vested or unvested and expected to vest | shares	5,826,821	5,826,821	5,826,821
Number of Options, Exercisable at March 31, 2017 | shares	4,100,657	4,100,657	4,100,657
Weighted Average Exercise Price Outstanding, beginning balance | $ / shares			$ 3.60
Weighted Average Exercise Price, Granted | $ / shares			3.24
Weighted Average Exercise Price, Exercised | $ / shares			1.18
Weighted Average Exercise Price,Forfeited | $ / shares			4.02
Weighted Average Exercise Price Outstanding, ending balance | $ / shares	$ 3.50	$ 3.50	3.50
Weighted Average Exercise Price, Outstanding at March 31, 2017 - vested or unvested and expected to vest | $ / shares	3.50	3.50	3.50
Weighted Average Exercise Price, Exercisable at March 31, 2017 | $ / shares	$ 3.53	$ 3.53	$ 3.53
Weighted Average Remaining Contractual Life Outstanding, Ending balance			4 years 7 months 2 days
Weighted Average Remaining Contractual Life, Outstanding at March 31, 2017 - vested or unvested and expected to vest			4 years 6 months 4 days
Weighted Average Remaining Contractual Life, Exercisable at March 31, 2017			2 years 7 months 13 days
Aggregate Intrinsic Value Outstanding, Ending balance | $	$ 130	$ 130	$ 130
Aggregate Intrinsic Value, Outstanding at March 31, 2017 - vested or unvested and expected to vest | $	130	130	130
Aggregate Intrinsic Value, Exercisable at March 31, 2017 | $	$ 130	$ 130	$ 130