Note 8 - Stockholders' Equity (Tables)
 12 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   
2016
    
2015
  
   
Number
of Shares
    
Weighted-
Average
Exercise
Price Per
Share
    
Number
of Shares
    
Weighted-
Average
Exercise
Price Per
Share
  
Beginning balance
    252,620     $ 44.18       255,671     $ 44.18  
Warrants granted
     5,238,971     $ 9.83       --       --  
Warrants exercised (cashless)
     (51,712 )   $ 13.60       --       --  
Warrants expired/canceled
     (611,156 )   $ 17.21       (3,051 )   $ 43.00  
Outstanding at June 30
     4,828,723     $ 9.37       252,620     $ 44.18  
Exercisable at June 30
     600,782     $ 19.02       252,620     $ 44.18  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   
Number of
Shares
    
Weighted-
Average
Exercise
Price
    
Weighted-
Average
Remaining
Contractual Life
    
Aggregate
Intrinsic
Value
  
Outstanding at June 30, 2015
     147,609     $ 25.51                  
                                 
Granted
     55,875     $ 9.64                  
Forfeited/cancelled
     (93,855 )   $ 27.02                  
Expired
     (5,251 )   $ 41.47                  
Exercised
     --       --                  
Outstanding at June 30, 2016
     104,378     $ 14.85       5.8     $ --  
Vested and Expected to Vest at June 30, 2016
     91,810     $ 15.34       5.7     $ --  
Exercisable at June 30, 2016
     61,271     $ 16.15       5.5     $ --  
Non Vested Stock Options Activity [Table Text Block]
   
Non-vested Stock
Options
    
Weighted-Average
Grant Date Fair Value
  
Outstanding at June 30, 2015
     89,198     $ 13.07  
Granted
     55,875     $ 5.75  
Vested
     (53,496 )   $ 9.79  
Forfeited
     (48,470 )   $ 13.35  
Outstanding at June 30, 2016
     43,107     $ 7.66  
Schedule of Assumptions Used [Table Text Block]
   
2016
    
2015
  
Expected life (years)
     5       5  
Risk-free interest rate
     1.5 %     1.5 %
Expected volatility
     80 %     75 %
Dividend yield
     0 %     0 %
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
   
2016
    
2015
  
   
Number of
Shares
    
Weighted-
Average
Grant Date
Fair Value
    
Number of
Shares
    
Weighted-
Average
Grant Date
Fair Value
  
Balance at June 30
    72,589     $ 22.40       40,190     $ 38.00  
Granted
     10,000     $ 2.98       54,850     $ 16.60  
Vested
     (6,120 )   $ 28.94       (18,828 )   $ 36.40  
Forfeited
     (12,903 )   $ 41.15       (3,623 )   $ 35.40  
Outstanding at June 30
     63,566     $ 14.96       72,589     $ 22.40