Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Accumulated depreciation and amortization	$ 6,216	$ 5,689
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	64,035,000	63,664,000
Common stock, shares outstanding	64,035,000	63,664,000
Senior Notes [Member] | 10% Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate of Senior Notes	10.00%	10.00%