TRANSITION PERIOD COMPARATIVE DATA - Statements of Operations (Details) - USD ($)	6 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Operating expenses:
Exploration and mine development costs	$ 9,628,803	$ 3,572,166	$ 10,874,502	$ 3,125,784	$ 6,381,501
General and administrative expenses	10,956,005	2,174,023	8,861,454	3,440,161	3,662,767
Loss from operations	(20,584,808)	(5,746,189)	(19,735,956)	(6,565,945)	(10,044,268)
Other (expense) income:
Interest (expense) income, net	(112,869)	(138,801)	(267,886)	53,961	128,377
(Loss) gain from foreign currency exchange	(8,543)	100,152	74,620	632,832	234,090
Loss before taxes and equity earnings	(20,706,220)	(5,784,838)	(19,929,222)	(5,879,152)	(9,681,801)
Income tax expense (benefit)	0	0	0	0	0
Loss on equity investments in unconsolidated affiliates	(642,135)	0	(64,626)	0	0
Net loss	$ (21,348,355)	$ (5,784,838)	$ (19,993,848)	$ (5,879,152)	$ (9,681,801)
Basic loss per weighted-average share (in dollars per share)	$ (1.35)	$ (0.47)	$ (1.48)	$ (0.71)	$ (1.56)
Diluted loss per weighted-average share (in dollars per share)	$ (1.35)	$ (0.47)	$ (1.48)	$ (0.71)	$ (1.56)
Basic weighted-average number of shares outstanding (in shares)	15,868,521	12,205,057	13,551,150	8,283,567	6,217,476
Diluted weighted-average number of shares outstanding (in shares)	15,868,521	12,205,057	13,551,150	8,283,567	6,217,476