Note 6 - Line of Credit (Details Textual) - Silicon Valley Bank [Member] - USD ($) $ in Thousands	Jun. 23, 2015	Jun. 30, 2008	Mar. 29, 2006
Credit Line, 2006 [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,000
Credit Line, 2008 [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 2,500
Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 625