Stockholders' Equity Transactions (Detail) (USD $)			3 Months Ended				3 Months Ended
	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2012 Common Stock [Member]	Sep. 30, 2012 Common Stock [Member]	Dec. 31, 2012 Additional Paid-in Capital [Member]	Jun. 30, 2012 Additional Paid-in Capital [Member]	Dec. 31, 2012 Treasury Stock [Member]	Jun. 30, 2012 Treasury Stock [Member]
Beginning balance (in shares)			20,108,906	20,095,713			1,000,000	1,000,000
Beginning balance	$ 37,108,000	$ 37,723,000	$ 201,000	$ 201,000	$ 14,080,000	$ 14,080,000	$ (5,615,000)	$ (5,615,000)
Options exercised, shares			702,000	27,000
Options exercised			7,000		1,369,000
Shares surrendered and cancelled under option exercise			(14,093)	(13,807)
Shares surrendered and held in Treasury under option exercise							371,890
Shares surrendered and held in Treasury under option exercise							(1,257,000)
Shares repurchased and held in Treasury							(434,627)
Shares repurchased and held in Treasury							128,588
Ending balance (in shares)			20,796,813	20,108,906			1,500,478	1,000,000
Ending balance	$ 37,108,000	$ 37,723,000	$ 208,000	$ 201,000	$ 15,449,000	$ 14,080,000	$ (7,307,000)	$ (5,615,000)