Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Summary of Significant Accounting Polices - Warrants (Details 4) - Common stock warrants - $ / shares	Dec. 31, 2015	Feb. 28, 2015	Dec. 31, 2012
Warrants
Warrants
Common stock that can be purchased with warrants (in shares)		180,274
Exercise price of warrants (in dollars per share)		$ 5.89
Warrants
Warrants
Common stock that can be purchased with warrants (in shares)	62,505		62,505
Exercise price of warrants (in dollars per share)	$ 6.00		$ 6.00