Goodwill and Intangible Assets (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Goodwill and intangible assets (Textual) [Abstract]
Amortization expense of finite life intangible assets	$ 76,000	$ 112,000	$ 172,000	$ 223,000
Amortization expense of finite life intangibles for remainder of 2012	144,000		144,000
Amortization expense of finite life intangibles for 2013	130,000		130,000
Amortization expense of finite life intangibles for 2014	69,000		69,000
Amortization expense of finite life intangibles for 2015	6,000		6,000
Amortization expense of finite life intangibles for 2016	$ 4,000		$ 4,000