Note 10 - Employee Benefit Plans (Detail) - Components of net periodic postretirement benefit cost (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Amortization of the prior service cost	$ (18)	$ (5)
Postretirement Health Benefit Plan [Member]
Service cost	3	8
Interest cost	6	17
Amortization of the unrecognized loss	(52)	(18)
Net periodic benefit cost	$ (61)	$ 2