Note 5 - Property, Plant, and Equipment (Detail) (USD $)	3 Months Ended	9 Months Ended
	Dec. 31, 2012	Mar. 31, 2013	Jun. 30, 2012
Sale Leaseback Transaction, Deferred Gain, Gross	$ 800,000
Lease Term	8 years
Proceeds from Sale of Property, Plant, and Equipment	5,100,000	5,787,000
Property, Plant and Equipment, Net		41,112,000	47,171,000
Number of Lease Renewal Options	3
Sale Leaseback Transaction, Lease Terms	2-3% rent increases over the initial term
Sale Leaseback Transaction, Annual Rental Payments	300,000
Salem Land and Building [Member]
Property, Plant and Equipment, Net	$ 4,300,000
Initial Term [Member]
Lease Term	5 years
Renewal Option [Member]
Lease Term	3 years