XML 45 R22.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Schedule of Warrant Activity

As of December 31, 2017, there were 2,559,612 warrants outstanding, with a weighted average exercise price of $4.28 per share, and annual expirations as follows:

 

Expiring in 2018     11,383  
Expiring in 2019     600,000  
Expiring in 2020     1,189,079  
Expiring in 2021     343,750  
Expiring in 2022     66,667  
Expiring thereafter     348,733  
      2,559,612