Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Preferred stock par value	$ 0.001	$ 0.001
Preferred stock shares authorized	100,000,000us-gaap_PreferredStockSharesAuthorized	100,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock par value	$ 0.001	$ 0.001
Common stock shares authorized	2,000,000,000us-gaap_CommonStockSharesAuthorized	2,000,000,000us-gaap_CommonStockSharesAuthorized
Common stock shares issued	125,687,607us-gaap_CommonStockSharesIssued	123,090,990us-gaap_CommonStockSharesIssued
Common stock shares outstanding	125,687,607us-gaap_CommonStockSharesOutstanding	123,090,990us-gaap_CommonStockSharesOutstanding

Face amount or stated value per share of common stock.

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