Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accumulated depreciation and amortization	$ 3,926	$ 3,842
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	1,495,000	1,495,000
Preferred stock, shares outstanding	1,495,000	1,495,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	70,104,000	65,641,000
Common stock, shares outstanding	70,104,000	65,641,000
10% Senior Unsecured Notes due 2017 | Senior Notes
Stated interest rate	10.00%	10.00%
10% Senior Secured Notes due 2021 | Senior Notes
Stated interest rate	10.00%	10.00%