|
Financial Instruments and Risk (Details Textual)
|
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Financial Instruments and Risk (Textual) [Abstract] | ||
| Maturity period of securities | One year or less | |
| Average days to maturity of Company's portfolio of cash equivalents and marketable securities | 121 days | 131 days |
| X | ||||||||||
|
- Definition
Average period to maturity for portfolio of cash and marketable securities. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Maturity period description. No definition available.
|