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Fair value of financial instruments
12 Months Ended
Dec. 31, 2014
Fair Value Disclosures [Abstract]  
Fair Value Disclosures [Text Block]
Note 15. Fair value of financial instruments
 
U.S GAAP establishes a three-tier hierarchy which prioritizes the inputs used in the valuation methodologies in measuring fair value:
 
Level 1  
Quoted market prices available in active markets for identical assets or liabilities as of the reporting date.
 
 
Level 2  
Pricing inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date.    
 
 
Level 3
Pricing inputs that are generally observable inputs and not corroborated by market data.  
 
Financial assets are considered Level 3 when their fair values are determined using pricing models, discounted cash flow methodologies or similar techniques and at least one significant model assumption or input is unobservable.   
 
The carrying amount of the Company’s financial assets and liabilities, such as cash, accounts receivable, prepaid expenses, accounts payable and accrued expenses, accrued dividends and unearned convention revenue approximate their fair value because of the short maturity of those instruments. The Company’s convertible Preferred stock and warrants approximate the fair value of such instruments based upon management’s best estimate of interest rates that would be available to the Company for similar financial arrangements at December 31, 2014, and 2013.  
 
The Company measures the fair value of the derivative liabilities and revalues its derivative warrant liability at every reporting period and recognizes gains or losses in the consolidated statements of operations and comprehensive income (loss) that are attributable to the change in the fair value of the derivative warrant liability.  
 
At December 31, 2014, and 2013, the Company has no derivative conversion feature and warrant liabilities.
  
The table below provides a summary of the changes in fair value, including net transfers in and/or out, of all financial assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the year ending December 31, 2013:  
 
 
 
Fair value measurement
 
 
 
using level 3 inputs
 
 
 
Derivatives
 
Total
 
Balance January 1, 2013
 
$
7,166
 
$
7,166
 
Total (gains) or losses (realized/unrealized) included in consolidated statements of operations
 
 
2,204
 
 
2,204
 
Purchases, issuances and settlements
 
 
 
 
 
Reclassification of derivative liabilities to equity upon modification of terms (Note 8)
 
 
(9,370)
 
 
(9,370)
 
Balance, December 31, 2013
 
$
 
$