Restatement (Details 2) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Cash Flows from Operating Activities:
Net income (loss)	$ 3,099,000	$ 828,000	$ 2,199,000	$ (1,258,000)
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Non-cash component of Amtrak Agreement			(1,108,000)
Accounts receivable			101,000	(1,025,000)
Accounts payable and accrued expenses			(870,000)	1,008,000
Other Income from Amtrack Agreement			3,200,000
Related accounts recievable and deferred revenue	2,400,000		2,400,000
Movement of income previously included within revenues to other income	23,000	97,000	26,000	126,000
Previously Reported [Member]
Cash Flows from Operating Activities:
Net income (loss)	3,099,000		2,199,000
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Accounts receivable			(762,000)
Accounts payable and accrued expenses			(1,115,000)
Adjustments [Member]
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Non-cash component of Amtrak Agreement			(1,108,000)
Accounts receivable			863,000
Accounts payable and accrued expenses			$ 245,000