Note 5 - Income Taxes (Detail) - Unrecognized Tax Benefits (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2012	Jun. 30, 2012
Beginning of period balance	$ 414	$ 365	$ 445	$ 445
Additions for tax positions of prior years		13
Decreases for tax positions of prior years	(1)
Additions for tax positions of the current year	32	36
End of period balance	$ 445	$ 414	$ 445	$ 445