Financial Instruments (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Financial Instruments (Textual) [Abstract]
Short-term investments contractual maturity period minimum	8		8
Maximum remaining maturities period of investments included in cash equivalents	3		3
Short-term investments contractual maturity period maximum	12		12
Average short-term investments maturity period	3		3
Goodwill, Impairment Loss	$ 3,388,000	$ 0	$ 3,388,000	$ 0
Impairment of Long-Lived Assets Held-for-use	687,000	0	687,000	0
Assets Held and Used, Long Lived, Fair Value Disclosure	678,000		678,000
FV of Goodwill, Grid	$ 0		$ 0