Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Accumulated depreciation and amortization	$ 5,689	$ 4,240
Preferred stock, par value (usd per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	1,495	1,495
Preferred stock, shares outstanding	1,495	1,495
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000	150,000
Common stock, shares issued	63,664	62,768
Common stock, shares outstanding	63,664	62,768
Ten Percent Senior Notes [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate	10.00%	10.00%