Financing Obligations (Details Textuals 5) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Line of Credit Facility [Line Items]
Total interest expense	$ 69,000	$ 48,000	$ 122,000	$ 94,000
Equipment Loan
Line of Credit Facility [Line Items]
Interest expense on the Credit Facility	4,000	1,000	7,000	7,000
Weighted average interest rate on credit facility	3.26%	3.24%	3.29%	3.15%
Rate of interest being charged on the Credit Facility	3.25%		3.25%
Unused Credit Facility fees	25,000	26,000	51,000	42,000
Total interest expense	$ 69,000	$ 48,000	$ 122,000	$ 94,000