v3.22.4
Cover
Jan. 26, 2023
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jan. 26, 2023
Entity File Number 000-55710
Entity Registrant Name NioCorp Developments Ltd.
Entity Central Index Key 0001512228
Entity Tax Identification Number 98-1262185
Entity Incorporation, State or Country Code A1
Entity Address, Address Line One 7000 South Yosemite Street
Entity Address, Address Line Two Suite 115
Entity Address, City or Town Centennial
Entity Address, State or Province CO
Entity Address, Postal Zip Code 80112
City Area Code 720
Local Phone Number 639-4647
Written Communications true
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false