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Note 10 - Fair Values of Financial Instruments
3 Months Ended
Mar. 31, 2016
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
10.
FAIR VALUES OF FINANCIAL INSTRUMENTS      
 
Cash and cash equivalents, accounts receivable, due from/to factor, accounts payable and accrued liabilities are carried at, or approximate, fair value because of their short-term nature.
 
The fair value of the warrant liabilities were measured using the following assumptions:
 
Risk-free interest rate
0.40 - 1.12%
Expected term (years)
0.57 - 4.48
Expected dividends
  0  
Volatility of stock price
86.4% - 112.3%
 
The warrant liabilities are considered Level 3 liabilities on the fair value hierarchy as the determination of fair value includes various assumptions about future activities and the Company’s stock prices and historical volatility as inputs.
 
Warrant issued under PI SPA
       
Fair value at January 1, 2016
    7,478  
Gain on derivative
    (2,337
)
      5,141  
         
Warrant issued under September 2015 SPA
       
Fair value at January 1, 2016
    96,806  
Loss on derivative
    2,375  
      99,181  
         
Balance, March 31, 2016
  $ 104,322