Note 10 - Employee Benefit Plans (Detail) - Components of net periodic postretirement benefit cost (Postretirement Health Benefit Plan [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Postretirement Health Benefit Plan [Member]
Service cost	$ 3	$ 8	$ 6	$ 16
Interest cost	6	17	12	34
Amortization of the unrecognized loss	(52)	(18)	(104)	(36)
Amortization of the prior service cost	(18)	(5)	(36)	(10)
Net periodic benefit cost (benefit)	$ (61)	$ 2	$ (122)	$ 4