Funds Received From Sale Of Income Tax Net Operating Losses (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating Loss Carryforwards [Line Items]
Funds received from sale of income tax net operating losses	$ 0	$ 0	$ 1,328,000	$ 2,272,000
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	108,000,000		108,000,000
Pennsylvania [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	39,000,000		39,000,000
New Jersey [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	25,000,000		25,000,000
Operating Loss Carryforwards, Amount of NOL Carryforwards sold	$ 16,000,000		$ 16,000,000
Maximum [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Dates			2030
Maximum [Member] | Pennsylvania [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Dates			2030
Maximum [Member] | New Jersey [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Dates			2018
Minimum [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Dates			2012
Minimum [Member] | Pennsylvania [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Dates			2018
Minimum [Member] | New Jersey [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Dates			2016