| 
           Note 6 - Notes Payable (Tables) 
         | 
        3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 
           Mar. 31, 2015 
         | 
      |||||||||||||||||||||||||||||||||||||||||||||||||||
| Notes Tables | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Assumptions Used in Calculating Fair Value of Warrants Issued [Table Text Block] | 
  | 
      ||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Maturities of Long-term Debt [Table Text Block] | 
  | 
      
| X | ||||||||||
| 
             
- Definition 
          Tabular disclosure for assumptions used in calculating fair value of warrants issued. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  |