Subsequent Events (Conversion of MGT Series D Preferred Shares to Common Stock) (Details) - shares	Apr. 13, 2016	Mar. 31, 2016	Jun. 30, 2015
Series D Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares outstanding (in shares)		110	0
Subsequent Event | Series D Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares outstanding (in shares)	0
Subsequent Event | Preferred Stock | Series D Preferred Stock
Subsequent Event [Line Items]
Conversion of convertible securities (in shares)	(110)
Subsequent Event | Common Stock
Subsequent Event [Line Items]
Conversion of convertible securities (in shares)	366,630