Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Textual)

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Stockholders' Equity (Details Textual) (USD $)
 3 Months Ended 9 Months Ended 9 Months Ended 9 Months Ended 0 Months Ended 1 Months Ended 9 Months Ended 12 Months Ended 0 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended 0 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Sep. 30, 2014
Liberty Media [Member]
Sep. 30, 2014
Other Current Assets [Member]
Dec. 31, 2013
Other Current Assets [Member]
Sep. 30, 2014
Related Party Current Assets [Member]
Dec. 31, 2013
Related Party Current Assets [Member]
Sep. 30, 2014
Common Stock [Member]
Dec. 31, 2013
Common Stock [Member]
Jan. 18, 2013
Common Stock [Member]
Liberty Media [Member]
Jan. 31, 2013
Common Stock [Member]
Liberty Media [Member]
Sep. 30, 2014
Common Stock [Member]
Open Market And Privately Negotiated Repurchases [Member]
Sep. 30, 2014
Common Stock [Member]
December 2012 Share Repurchase Program [Member]
Dec. 31, 2013
Common Stock [Member]
October 2013 Share Repurchase Program [Member]
Liberty Media [Member]
Apr. 25, 2014
Common Stock [Member]
October 2013 Share Repurchase Program [Member]
Liberty Media [Member]
Oct. 09, 2013
Common Stock [Member]
October 2013 Share Repurchase Program [Member]
Liberty Media [Member]
Apr. 25, 2014
Common Stock [Member]
Amended October 2013 Share Repurchase Program [Member]
Liberty Media [Member]
Sep. 30, 2014
Common Stock [Member]
Amended October 2013 Share Repurchase Program [Member]
Liberty Media [Member]
Sep. 30, 2013
Common Stock [Member]
Amended October 2013 Share Repurchase Program [Member]
Liberty Media [Member]
Sep. 30, 2014
Common Stock [Member]
May ASR Agreement [Member]
Aug. 31, 2014
Common Stock [Member]
May ASR Agreement [Member]
May 31, 2014
Common Stock [Member]
May ASR Agreement [Member]
Sep. 30, 2014
Common Stock [Member]
August ASR Agreement [Member]
Sep. 30, 2014
Common Stock [Member]
August ASR Agreement [Member]
Aug. 31, 2014
Common Stock [Member]
August ASR Agreement [Member]
Oct. 24, 2014
Common Stock [Member]
Subsequent Event [Member]
Open Market And Privately Negotiated Repurchases [Member]
Oct. 01, 2014
Common Stock [Member]
Subsequent Event [Member]
August ASR Agreement [Member]
Oct. 01, 2014
Common Stock [Member]
Subsequent Event [Member]
August ASR Agreement [Member]
Additional Stockholder's Equity (Textual) [Abstract]                                                              
Common stock, par value (in dollars per share) $ 0.001   $ 0.001   $ 0.001                                                    
Common stock, shares authorized (up to 9,000,000,000) 9,000,000,000   9,000,000,000   9,000,000,000                                                    
Common stock, shares issued (in shares) 5,542,621,493   5,542,621,493   6,096,220,526           5,542,621,493 6,096,220,526                                      
Common stock, shares outstanding 5,538,190,736   5,538,190,736   6,096,220,526                                                    
Common stock reserved for issuance 582,655,000   582,655,000                                                        
Stock repurchase program, authorized amount                               $ 6,000,000,000     $ 500,000,000           $ 600,000,000     $ 250,000,000      
Number of shares repurchases and retired                     570,055,203       273,435,722 [1]           92,888,561 [2]   151,846,125 [3]       51,884,795 [4]        
Stock repurchased and retired during period, value     1,955,826,000               2,006,013,000       909,609,000 [1]             340,000,000 [2] 506,404,000 [3]       250,000,000 [4]        
Stock repurchased and retired during period, value                                 160,000,000     340,000,000                 81,007,000    
Number of shares repurchased and retired                                       92,888,561     151,846,125     51,884,795     24,555,150 19,431,708  
Stock repurchase program, unused portion of authorized amount                                               93,596,000              
Share price (in dollars per share)                                   $ 3.66                          
Loss on change in value of derivatives 0 0 34,485,000 0   34,485,000                                                  
Remaining amount authorized under the stock repurchase program 2,231,626,000   2,231,626,000                                                        
Treasury stock (15,565,000)   (15,565,000)   0                                                    
Number of shares repurchased 1,090,313,069   1,090,313,069                                                        
Aggregate cost for shares repurchased 3,768,374,000   3,768,374,000                                                       68,118,000
Amortization of costs related to share-lending arrangement and other issuance costs 3,524,000 3,178,000 10,303,000 9,484,000                                                      
Unamortized, debt issuance costs 2,398,000   2,398,000   12,701,000   2,345,000 12,423,000 53,000 278,000                                          
Preferred stock, par value (in dollars per share) $ 0.001   $ 0.001   $ 0.001                                                    
Undesignated preferred stock, shares authorized 50,000,000   50,000,000   50,000,000                                                    
Preferred stock, shares issued 0   0   0                                                    
Preferred stock, shares outstanding 0   0   0                                                    
Conversion of preferred stock to common stock (in shares)                     3,259   1,293,509,076 1,293,509,076                                  
Number of warrants exercised (in shares)     1,788,000                                                        
Issuance of common stock upon exercise of warrants (in shares)                     99,349                                        
Warrants outstanding 16,667,000   16,667,000   18,455,000                                                    
Weighted average exercise price on outstanding warrants $ 2.50   $ 2.50   $ 2.55                                                    
Warrant expenses $ 0 $ 0 $ 0 $ 0                                                      
[1] As of September 30, 2014, $15,565 of common stock repurchases had not settled, nor been retired, and were recorded as Treasury stock within our unaudited consolidated balance sheets and unaudited consolidated statements of stockholders' equity.
[2] On October 9, 2013, we entered into an agreement to repurchase $500,000 of our common stock from Liberty Media. Pursuant to this agreement, we repurchased $160,000 of our common stock from Liberty Media in 2013. On April 25, 2014, we completed the final purchase installment and repurchased 92,888,561 shares of our common stock for $340,000 from Liberty Media at a price of $3.66 per share. As there were certain terms in the forward purchase contract with Liberty Media that could have caused the obligation not to be fulfilled, the instrument was classified as a liability and was marked to fair value with any gain or loss recorded to our unaudited consolidated statements of comprehensive income. We recognized $34,485 to Loss on change in value of derivatives in our unaudited consolidated statements of comprehensive income during the nine months ended September 30, 2014.
[3] In May 2014, we entered into an accelerated share repurchase agreement (the "May ASR Agreement") and prepaid $600,000 to a third-party financial institution to repurchase our common stock. Under the May ASR Agreement, we received 151,846,125 shares of our common stock that were retired upon receipt. Upon settlement of the May ASR Agreement in August 2014, we received $93,596 for the unused portion of the original prepayment.
[4] In August 2014, we entered into a second accelerated share repurchase agreement (the "August ASR Agreement") with a third-party financial institution to repurchase up to $250,000 of our common stock. Under the August ASR Agreement, we prepaid $250,000 to the financial institution, of which $68,118 related to repurchases that settled on October 1, 2014. During the three months ended September 30, 2014, we received 51,884,795 shares of our common stock that were retired upon receipt. Upon settlement of the August ASR Agreement on October 1, 2014, we received an additional 19,431,708 shares of our common stock that were retired upon receipt. The aggregate purchase price we paid and the total aggregate number of shares repurchased under the August ASR Agreement were determined based on the VWAP of our common stock minus a discount.