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FAIR VALUE OF FINANCIAL INSTRUMENTS - Changes in fair value of the Company level 3 financial instruments (unaudited) (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance $ (1,865) $ (140) $ (978) $ (585)
Increase due to change in fair value of warrant liabilities (4,805) (1,101) (5,692) (656)
Reduction due to warrant exercises 706   706  
Ending balance $ (5,964) $ (1,241) $ (5,964) $ (1,241)