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COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of lease commitments

NioCorp has the following land, office, facility and equipment lease commitments in place as of June 30, 2017:

 

          Payments due by period  
    Total     Less than 1 year     1-3 years     4-5 years     After 5 years  
Debt   $ 5,012     $ 2,956     $ 2,056     $     $  
Operating leases     137       75       63              
Total contractual obligations   $ 5,149     $ 3,031     $ 2,119     $     $