Capital Stock - Series D Preferred Stock Transactions - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 6 Months Ended 12 Months Ended
Sep. 10, 2014
Aug. 06, 2014
Jun. 26, 2014
May. 29, 2014
Mar. 12, 2013
Jan. 22, 2013
Mar. 09, 2012
Dec. 30, 2008
May. 12, 2008
Feb. 28, 2015
Nov. 30, 2014
Oct. 31, 2014
Jun. 30, 2015
Dec. 31, 2014
Dec. 31, 2013
Class of Stock [Line Items]                              
Number of shares of common stock sold 29,630 40,000 36,667 22,223 33,334 67,500                  
Convertible preferred stock, conversion price             $ 60.00                
Previously Reported [Member]                              
Class of Stock [Line Items]                              
Number of shares of common stock sold 4,444,445 6,000,000 5,500,000 3,333,333 5,000,000 10,125,000                  
Series D Preferred Stock [Member]                              
Class of Stock [Line Items]                              
Number of shares of common stock sold               47              
Total proceeds               $ 4,700              
Preferred stock, price per share               $ 100,000              
Preferred stock, shares issued                         43 43 43
Preferred stock, shares outstanding                         43 43 43
Initial conversion price               $ 37.50   $ 6.7200 $ 8.6400 $ 9.6705      
Issuance of common stock from conversion of preferred stock, shares               2,667              
Convertible preferred stock, conversion price                         $ 6.72    
Series D Preferred Stock [Member] | Previously Reported [Member]                              
Class of Stock [Line Items]                              
Number of shares of common stock sold               43              
Initial conversion price               $ 0.25              
Issuance of common stock from conversion of preferred stock, shares               400,000              
Series D Preferred Stock [Member] | X-Master Inc. [Member]                              
Class of Stock [Line Items]                              
Number of shares of common stock sold               10              
Series D Preferred Stock [Member] | Co-Chairman and Chief Executive Officer [Member]                              
Class of Stock [Line Items]                              
Number of shares of common stock sold               33              
Series B Preferred Stock [Member]                              
Class of Stock [Line Items]                              
Preferred stock, shares issued                         300,000 300,000 300,000
Preferred stock, shares outstanding                         300,000 300,000 300,000
Initial conversion price                 $ 75.00   $ 0.05670 $ 0.06447      
Convertible preferred stock, conversion price                         $ 6.72 $ 0.0576  
Series B Preferred Stock [Member] | Previously Reported [Member]                              
Class of Stock [Line Items]                              
Initial conversion price                 $ 0.5