Note 4 - Equipment (Tables)
 12 Months Ended
Jun. 30, 2016
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
2016
    
2015
    
Estimated Useful Life
(in years)
  
Machinery and equipment
   $ 6,604     $ 5,895       2.5 - 10  
Computer and software
     397       897       2 - 5  
Office equipment
     260       741       5 - 10  
Leasehold improvements
     149       339       Shorter of 5 years or remaining lease term  
      7,410       7,872              
Less accumulated depreciation and amortization     (4,448 )     (4,935 )            
    $ 2,962     $ 2,937