Prepaid Expenses and Other Assets (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Prepaid Expenses and Other Assets
Prepaid insurance	$ 611,000	$ 590,000
Prepaid contractor fees and vendor advances	148,000	1,557,000
Accounts receivable		682,000
Recoupable deposits and other	285,000	290,000
Prepaid expenses and other current assets	1,044,000	3,119,000
Prepaid insurance included in non-current assets	$ 163,000	$ 264,000