Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Acquisition of DraftDay.com) (Details)

v3.6.0.2
Acquisitions (Acquisition of DraftDay.com) (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Oct. 10, 2016
USD ($)
shares
Sep. 16, 2016
Jun. 14, 2016
USD ($)
shares
May 12, 2016
$ / shares
shares
Apr. 13, 2016
shares
Mar. 24, 2016
USD ($)
Dec. 28, 2015
Sep. 08, 2015
USD ($)
member
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Nov. 20, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2016
shares
Jun. 30, 2016
$ / shares
shares
Dec. 03, 2015
$ / shares
shares
Sep. 29, 2015
Sep. 16, 2013
$ / shares
May 10, 2012
$ / shares
shares
Business Acquisition [Line Items]                                  
Common stock, par value (in dollars per share) | $ / shares                 $ 0.001       $ 0.001        
Number of warrants issued (in shares)                                 1,068
Warrants, exercise price per share (in dollars per shares) | $ / shares                               $ 2,000 $ 12,800
Common stock, shares issued (in shares)                 3,244,275       3,023,753        
Common stock issued to settle notes | $           $ 825     $ 30,175   $ 0            
Preferred stock issued to settle note | $                 $ 7,600   $ 0            
Number of shares issued (in shares)                           437,500      
DraftDay                                  
Business Acquisition [Line Items]                                  
Number of shares issued in acquisition (in shares)               67,879                  
Notes issued to sellers | $               $ 2,250                  
MGT Sports | DraftDay                                  
Business Acquisition [Line Items]                                  
Number of shares issued in acquisition (in shares)               63,647                  
Common stock, par value (in dollars per share) | $ / shares               $ 0.001                  
Third Parties | DraftDay                                  
Business Acquisition [Line Items]                                  
Number of shares issued in acquisition (in shares)               4,232                  
Number of warrants issued (in shares)               150                  
Promissory Note                                  
Business Acquisition [Line Items]                                  
Stated interest rate (as a percent)               5.00%             5.00%    
Promissory Note due September 29, 2015 | Promissory Note                                  
Business Acquisition [Line Items]                                  
Notes issued to sellers | $               $ 250                  
Promissory Note due September 29, 2015 | Promissory Note | MGT Sports | DraftDay                                  
Business Acquisition [Line Items]                                  
Notes issued to sellers | $               234                  
Promissory Note due September 29, 2015 | Promissory Note | Third Parties | DraftDay                                  
Business Acquisition [Line Items]                                  
Notes issued to sellers | $               16                  
Promissory Note due March 8, 2016 | Promissory Note | MGT Sports | DraftDay                                  
Business Acquisition [Line Items]                                  
Notes issued to sellers | $               1,875                  
Promissory Note due March 8, 2016 | Promissory Note | Third Parties | DraftDay                                  
Business Acquisition [Line Items]                                  
Notes issued to sellers | $               125                  
Promissory Note due September 8, 2015 | Promissory Note                                  
Business Acquisition [Line Items]                                  
Notes issued to sellers | $               $ 2,000                  
Conversion of MGT Sports Convertible Securities                                  
Business Acquisition [Line Items]                                  
Payment of interest | $ $ 16                                
DraftDay Gaming Group                                  
Business Acquisition [Line Items]                                  
Common stock, shares issued (in shares)               11,250                  
Number of board members | member               3                  
Number of board members designated by parent | member               2                  
Number of board members designated by affiliate | member               1                  
Transfers to related party | $                   $ 550              
DraftDay Gaming Group | MGT Sports | DraftDay                                  
Business Acquisition [Line Items]                                  
Number of shares issued in acquisition (in shares)               2,550                  
Number of warrants issued (in shares)               1,500                  
Warrants, exercise price per share (in dollars per shares) | $ / shares               $ 400                  
DraftDay Gaming Group | Third Parties | DraftDay                                  
Business Acquisition [Line Items]                                  
Number of shares issued in acquisition (in shares)               150                  
Number of warrants issued (in shares)               350                  
Warrants, exercise price per share (in dollars per shares) | $ / shares               $ 400                  
Affiliated Entity                                  
Business Acquisition [Line Items]                                  
Shares issued, price per share (in dollars per share) | $ / shares                           $ 9.40      
Affiliated Entity | DraftDay Gaming Group | Sportech                                  
Business Acquisition [Line Items]                                  
Common stock, shares issued (in shares)               9,000                  
Series D Preferred Stock                                  
Business Acquisition [Line Items]                                  
Preferred stock issued to settle note | $           $ 110                      
Common Stock                                  
Business Acquisition [Line Items]                                  
Number of shares issued (in shares) 136,304                     1,013,068          
Reverse stock split, conversion ratio   0.05         0.001                    
Preferred Stock | Series D Preferred Stock                                  
Business Acquisition [Line Items]                                  
Shares converted (in shares)         110                        
Preferred Stock | Series A Preferred Stock | DraftDay Gaming Group                                  
Business Acquisition [Line Items]                                  
Shares issued (in shares)       550                          
Shares issued, price per share (in dollars per share) | $ / shares       $ 1                          
Preferred Stock | Series A Preferred Stock | DraftDay Gaming Group | Sportech                                  
Business Acquisition [Line Items]                                  
Shares issued (in shares)       450                          
Shares issued, price per share (in dollars per share) | $ / shares       $ 1         $ 1                
Common Stock                                  
Business Acquisition [Line Items]                                  
Shares converted (in shares)         18,332                        
Second MGT Exchange Agreement                                  
Business Acquisition [Line Items]                                  
Convertible debt | $     $ 940                            
Debt converted value | $     $ 11                            
Second MGT Exchange Agreement | Common Stock                                  
Business Acquisition [Line Items]                                  
Issuance of conversion shares (in shares)     132,092