Quarterly report pursuant to Section 13 or 15(d)

BALANCE SHEETS (UNAUDITED) (Parenthetical)

v2.4.1.9
BALANCE SHEETS (UNAUDITED) (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
LONG-TERM LIABILITIES    
Rate of Senior notes (in hundredths) 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage 8.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
STOCKHOLDERS' EQUITY    
Preferred Stock, par value (in dollars per share) $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred Stock, shares authorized (in shares) 5,000,000us-gaap_PreferredStockSharesAuthorized 5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred Stock, shares outstanding (in shares) 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common Stock, par value (in dollars per share) $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, shares authorized (in shares) 95,000,000us-gaap_CommonStockSharesAuthorized 95,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, shares outstanding (in shares) 61,553,309us-gaap_CommonStockSharesOutstanding 61,066,712us-gaap_CommonStockSharesOutstanding