Note 5 - Convertible Debentures (Tables)
 12 Months Ended
Jun. 30, 2016
Notes Tables  
Convertible Debt [Table Text Block]
Convertible debentures
   $ 12,500  
Unamortized debt discount
     (9,851 )
Unamortized debt issue costs
     (160 )
Convertible debentures, net
   $ 2,489  
Schedule of Extinguishment of Debt [Table Text Block]
Payment
   $ 7,500  
Repayment of Thirty-Year debentures
     (5,500 )
Payment of accrued liquidated damages and interest
     (897 )
Loss on modification of Series A warrants
     (149 )
Cancellation of Series B derivative obligation
     (159 )
Loss on extinguishment of debt
   $ 795