Summary of Stock Option Plans (Detail) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014 Stock Options	Jun. 30, 2014 Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	3,200
Number of Shares
Outstanding at beginning of period		1,435,000
Granted		0
Exercised		(37,000)
Cancelled		(62,000)
Outstanding at end of period		1,336,000	1,435,000
Weighted Average Exercise Price
Outstanding at beginning of period		$ 11.76
Granted		$ 0.00
Exercised		$ 6.33
Cancelled		$ 23.58
Outstanding at end of period		$ 11.37	$ 11.76
Weighted Average Remaining Contractual Term (Years)
Outstanding at end of period		2 years 8 days	2 years 2 months 24 days