Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Accumulated depreciation and amortization	$ 3,842	$ 3,448
Preferred stock, par value (usd per share)	$ 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 (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	65,641,000	64,721,000
Common stock, shares outstanding	65,641,000	64,721,000
10% Senior Notes | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	10.00%	10.00%