Note 8 - Employee Benefit Plans (Detail) - Assumptions Used to Determine Accumulated Benefit Obligations	6 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Jun. 30, 2011
Defined Benefit Retirment Plan [Member]
Discount rate	4.21%	3.19%	5.42%
Measurement date	December 31, 2011	December 31, 2012	June 30, 2011
Post Retirment Benefit Plan [Member]
Discount rate	3.77%	2.98%	4.71%
Measurement date	December 31, 2011	December 31, 2012	June 30, 2011