Note 12 - Preferred Stock (Details Textual) |
Mar. 18, 2009
$ / shares
shares
|
Dec. 31, 2016
$ / shares
|
Dec. 31, 2015
$ / shares
|
|---|---|---|---|
| Preferred Stock Dividends Number of Preferred Share Purchase Rights Distributed for each Share of Common Stock Outstanding | 1 | ||
| Common Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 | $ 0.01 |
| Preferred Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 | |
| Series A Junior Participating Preferred Stock [Member] | |||
| Preferred Stock, Par or Stated Value Per Share | $ 0.01 | ||
| Preferred Share Purchase Right [Member] | |||
| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right | shares | 0.001 | ||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 25 |