Property and Equipment (Details Textuals) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Property and Equipment
Depreciation and amortization expense	$ 119,000	$ 129,000	$ 238,000	$ 253,000
Amortization of leasehold improvements	65,000	65,000	131,000	131,000
Impairment loss	68,000		68,000
Loss on disposal of fixed asset		$ 49,000		$ 49,000