|
Available-for-sale Securities (Details Textual) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended | |
|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
|
| Available for Sale Securities (Textual) [Abstract] | ||
| Sales of available-for-sale marketable securities | $ 0 | $ 0 |
| Maturity of fair value of marketable securities | 1 year | |