Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Accumulated depreciation and amortization	$ 7,847	$ 5,689
Preferred stock, par value (usd per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized	5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	1,495,000us-gaap_PreferredStockSharesIssued	1,495,000us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding	1,495,000us-gaap_PreferredStockSharesOutstanding	1,495,000us-gaap_PreferredStockSharesOutstanding
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000us-gaap_CommonStockSharesAuthorized	150,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	64,721,000us-gaap_CommonStockSharesIssued	63,664,000us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	64,721,000us-gaap_CommonStockSharesOutstanding	63,664,000us-gaap_CommonStockSharesOutstanding
10% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	10.00%	10.00%

Accumulated depreciation and amortization on other long term assets.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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