|
Consolidated Statements of Stockholders' Equity (Parentheticals) (Additional Paid-in Capital [Member], USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Stock issued offering costs | $ 1.4 | $ 0.6 | $ 3.8 |
| Series A Convertible Preferred Stock [Member] | |||
| Stock issued offering costs | $ 1.4 | ||