Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

No definition available.

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	Dec. 31, 2016	Aug. 31, 2016	Feb. 28, 2015	Dec. 31, 2014
Offer and Sale
Common stock issued through controlled equity offering (in usd per share)	$ 10.00			$ 36.80
Common stock and warrants issued for cash
Common stock and warrants issued for cash (in usd per share)		$ 6.40	$ 24.00