Quarterly report pursuant to Section 13 or 15(d)

Investments (Details Textual)

v2.4.0.6
Investments (Details Textual) (USD $)
3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Mutual funds [Member]
Investments (Textual) [Abstract]    
Recognized gross realized losses $ 0 $ 4,000