Note 2 - Stockholders' Equity - Non-Cash Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cost of Sales [Member]
Cost of product sales	$ 18	$ 30
Research and Development Expense [Member]
Cost of product sales	41	63
Selling, General and Administrative Expenses [Member]
Cost of product sales	76	220
Cost of product sales	$ 135	$ 313