Stock Benefit Plans - Schedule of Share Based Compensation Options Outstanding and Exercisable By Price Range (Detail) - $ / shares	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number of Shares	3,513,963	4,221,579	4,307,248
Options Outstanding, Weighted Average Remaining Contractual Term	4 years 2 months 4 days	4 years 2 months 1 day	2 years 8 months 1 day
Options Outstanding, Weighted Average Exercise Price	$ 5.65	$ 6.50	$ 9.78
$3.40 - $3.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	3.40
Weighted Average Exercise Price, Upper	$ 3.40
Options Outstanding, Number of Shares	50,000
Options Outstanding, Weighted Average Remaining Contractual Term	5 years 7 months 2 days
Options Outstanding, Weighted Average Exercise Price	$ 3.40
Options Exercisable, Number of Shares	16,666
Options Exercisable, Weighted Average Exercise Price	$ 3.40
$3.59 - $3.59 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	3.59
Weighted Average Exercise Price, Upper	$ 3.59
Options Outstanding, Number of Shares	366,667
Options Outstanding, Weighted Average Remaining Contractual Term	5 years 5 months 4 days
Options Outstanding, Weighted Average Exercise Price	$ 3.59
Options Exercisable, Number of Shares	131,771
Options Exercisable, Weighted Average Exercise Price	$ 3.59
$3.63 - $3.63 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	3.63
Weighted Average Exercise Price, Upper	$ 3.63
Options Outstanding, Number of Shares	818,365
Options Outstanding, Weighted Average Remaining Contractual Term	5 years 29 days
Options Outstanding, Weighted Average Exercise Price	$ 3.63
Options Exercisable, Number of Shares	219,905
Options Exercisable, Weighted Average Exercise Price	$ 3.63
$3.91 - $3.91 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	3.91
Weighted Average Exercise Price, Upper	$ 3.91
Options Outstanding, Number of Shares	75,000
Options Outstanding, Weighted Average Remaining Contractual Term	3 years 4 months 2 days
Options Outstanding, Weighted Average Exercise Price	$ 3.91
Options Exercisable, Number of Shares	69,791
Options Exercisable, Weighted Average Exercise Price	$ 3.91
$4.01 - $4.01 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	4.01
Weighted Average Exercise Price, Upper	$ 4.01
Options Outstanding, Number of Shares	635,896
Options Outstanding, Weighted Average Remaining Contractual Term	6 years 25 days
Options Outstanding, Weighted Average Exercise Price	$ 4.01
Options Exercisable, Number of Shares	0
Options Exercisable, Weighted Average Exercise Price	$ 0
$4.31- $5.65 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	4.31
Weighted Average Exercise Price, Upper	$ 5.65
Options Outstanding, Number of Shares	356,993
Options Outstanding, Weighted Average Remaining Contractual Term	3 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 4.84
Options Exercisable, Number of Shares	305,949
Options Exercisable, Weighted Average Exercise Price	$ 4.84
$5.72 - $6.90 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	5.72
Weighted Average Exercise Price, Upper	$ 6.90
Options Outstanding, Number of Shares	402,548
Options Outstanding, Weighted Average Remaining Contractual Term	2 years 7 months 20 days
Options Outstanding, Weighted Average Exercise Price	$ 6.20
Options Exercisable, Number of Shares	399,907
Options Exercisable, Weighted Average Exercise Price	$ 6.20
$7.01 - $9.55 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	7.01
Weighted Average Exercise Price, Upper	$ 9.55
Options Outstanding, Number of Shares	506,039
Options Outstanding, Weighted Average Remaining Contractual Term	3 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 9.17
Options Exercisable, Number of Shares	373,539
Options Exercisable, Weighted Average Exercise Price	$ 9.31
$9.64 - $12.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	9.64
Weighted Average Exercise Price, Upper	$ 12.40
Options Outstanding, Number of Shares	222,455
Options Outstanding, Weighted Average Remaining Contractual Term	10 months 2 days
Options Outstanding, Weighted Average Exercise Price	$ 11.05
Options Exercisable, Number of Shares	214,955
Options Exercisable, Weighted Average Exercise Price	$ 11.02
$15.60 - $15.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	15.60
Weighted Average Exercise Price, Upper	$ 15.60
Options Outstanding, Number of Shares	80,000
Options Outstanding, Weighted Average Remaining Contractual Term	1 year 6 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 15.60
Options Exercisable, Number of Shares	80,000
Options Exercisable, Weighted Average Exercise Price	$ 15.60
$3.40 - $15.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Weighted Average Exercise Price, Lower	3.40
Weighted Average Exercise Price, Upper	$ 15.60
Options Outstanding, Number of Shares	3,513,963
Options Outstanding, Weighted Average Remaining Contractual Term	4 years 2 months 4 days
Options Outstanding, Weighted Average Exercise Price	$ 5.65
Options Exercisable, Number of Shares	1,812,483
Options Exercisable, Weighted Average Exercise Price	$ 6.98