Note 6 - Borrowings Under Line of Credit (Detail) (PNC Bank, National Association [Member], USD $)	3 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Feb. 29, 2012
Line of Credit Facility, Maximum Borrowing Capacity			$ 8,000,000
Line of Credit Facility, Interest Rate at Period End	2.20%
Line of Credit Facility, Amount Outstanding	2,400,000	3,100,000
Line of Credit Facility, Expiration Date	Feb. 28, 2014
Sublimit For The Issuance of Standy Or Trade Letters Of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,000,000
Credit Facility [Member]
Debt Instrument, Basis Spread on Variable Rate			2.00%