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Fair Value Measurements
6 Months Ended
Jun. 30, 2019
Fair Value Disclosures [Abstract]  
Fair Value Measurements
Fair Value Measurements
The accounting guidance defines fair value, establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:
Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
Level 2: Quoted prices for similar assets and liabilities in active markets, quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability.
Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e. supported by little or no market activity).
 
 
 
Fair Value Measurement Using
 
June 30,
 
Quoted Prices
in Active
Markets for
Identical Assets
 
Significant
Other
Observable
Inputs
 
Significant
Unobservable
Inputs
 
2019
 
Level 1
 
Level 2
 
Level 3
Assets
 

 
 

 
 

 
 

Cash and cash equivalents
$
15,294,526

 
$
15,294,526

 
$

 
$

Total assets
$
15,294,526

 
$
15,294,526

 
$

 
$

 
 
 
Fair Value Measurements Using
 
December 31,
 
Quoted Prices
in Active
Markets for
Identical Assets
 
Significant
Other
Observable
Inputs
 
Significant
Unobservable
Inputs
 
2018
 
Level 1
 
Level 2
 
Level 3
Assets
 

 
 

 
 

 
 

Cash and cash equivalents
$
16,522,729

 
$
16,522,729

 
$

 
$

Total assets
$
16,522,729

 
$
16,522,729

 
$

 
$


As discussed in Note 2 above, there were no warrants exercisable for the Company’s convertible preferred stock following the closing of the IPO. Of the 37.2 million warrants (pre-split) previously exercisable for preferred stock, 35.7 million warrants (pre-split) expired on the effective date of the IPO.  The remaining 1.5 million warrants previously exercisable for preferred stock were adjusted to become exercisable for common stock. Prior to the IPO, the Company estimated fair value of the convertible preferred stock warrants at the time of issuance and subsequent remeasurement using the Black-Scholes-Merton model at each reporting date.  
On the date of the IPO and going forward, all outstanding warrants are accounted for as equity and are not subject to remeasurement.