CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 22,247	$ 2,706
Restricted cash	2,700
Due from related party	106
Prepaid expenses and other	75	47
Total Current Assets	25,128	2,753
Equipment, net	16	51
Right of use asset	372
Investment in land	600	600
Total Assets	26,116	3,404
CURRENT LIABILITIES
Accounts payable and accrued liabilities	407	115
Due to related party	712
Lease liability, current	124
Total Current Liabilities	1,243	115
Reclamation obligation	132	132
Lease liability, long-term	253
Repurchase option	1,047	933
Total Liabilities	2,675	1,180
Commitments and Contingencies (Note 9)
SHAREHOLDERS' EQUITY:
Common shares, no par value - unlimited shares authorized; shares outstanding December 31, 2021 and December 31, 2020 - 212,466,889 and 105,308,445, respectively	136,906	111,823
Additional paid in capital	25,753	24,217
Accumulated deficit	(139,218)	(133,816)
Total Shareholders' Equity	23,441	2,224
Total Liabilities and Shareholders' Equity	$ 26,116	$ 3,404

Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

No definition available.

Name:	reemf_InvestmentInLand
Namespace Prefix:	reemf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.