General And Administrative Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
General and Administrative Expenses:            
Rent and utilities         $ 118 $ 100
Insurance         5 3
Telephone         10 9
Office Services and Supplies         25 30
Other         10 14
Total General and Administrative Expenses $ 69 $ 44 $ 139 $ 130 $ 168 $ 156