Prepaid Expenses and Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Prepaid Expenses and Other Assets
Prepaid insurance	$ 380	$ 542
Prepaid contractor fees and vendor advances	67	100
Taxes receivable	117	90
Recoupable deposits and other	139	103
Prepaid expenses and other assets	$ 703	$ 835