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Shareholders' Equity (Tables)
6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Statement Of Stockholders Equity [Abstract]    
Summary of warrant activity  

 

 

 

 

 

 

 

 

 

  

  

Number of

 

 

 

 

Weighted

 

 

 

Shares Issuable

 

Weighted Avg.

 

Remaining

 

 

    

Under Warrants

    

Exercise Price

    

Life (Years)

 

  

  

  

 

 

 

 

  

  

Balance, December 31, 2012

   

1,557,980 

 

$

4.16 

 

   

   

Issued

   

798,872 

 

 

3.80 

 

   

   

Exchanged for shares

   

(1,948,948)

 

 

4.02 

 

 

   

Balance, December 31, 2013

   

407,904 

 

 

3.35 

 

3.43 

   

Issued

   

8,495,444 

 

 

2.05 

 

   

   

Balance, December 31, 2014

   

8,903,348 

 

 

2.06 

 

4.57 

   

 

Summary of assumptions used to determine fair value of warrants

 

 

 

 

    

 

 

 

Both Periods

Expected term

 

1.5 - 5 Years

Expected dividend

 

0

Volatility

 

26% - 38%

Risk-free interest rate

 

0.25% - 1.37%

 

 

 

 

 

    

Both

 

 

Periods

Expected term

 

1.5 - 5 Years

Expected dividend

 

0

Volatility

 

26% - 38%

Risk-free interest rate

 

0.12% - 1.14%