XML 31 R22.htm IDEA: XBRL DOCUMENT v3.7.0.1
Summary of Significant Accounting Policies (Details) - shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Potentially dilute securities excluded from calculation 1,563,672 2,810,832
Options to purchase common stock [Member]    
Potentially dilute securities excluded from calculation 309,037 289,380
Convertible preferred stock [Member]    
Potentially dilute securities excluded from calculation 2,926 217,119
Warrants to purchase common stock [Member]    
Potentially dilute securities excluded from calculation 1,251,709 2,304,333