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SUPPLEMENTAL FINANCIAL INFORMATION
 12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Supplemental Financial Information SUPPLEMENTAL FINANCIAL INFORMATION
The components of revenues are as follows:
The Company had two major customers to which its sales for the year were as follows: 2021 - $1.57 million; $1.39 million (2020 (one major customer) - $1.55 million); (2019 (four major customers) - $2.72 million; $0.77 million; $0.75 million; $0.74 million).
The Company’s revenues by country of customer for the current year were as follows: 2021 - $1.72 million - U.S.; $1.39 million - Estonia; $0.08 million - Other (2020 - $1.66 million - U.S.) (2019 - $5.80 million - U.S.; $0.07 million - Other).
The Company did not have any deferred revenue at December 31, 2021, 2020 and 2019.
The components of trade receivables are as follows:

The Company had two major customers for which there were outstanding trade receivables as of December 31, 2021 as follows: $1.39 million; $0.37 million (as of December 31, 2020 (one major customer) - $0.35 million).

The Company's trade receivables by country of customer as of December 31, 2021 were as follows: $0.47 million - U.S., $1.39 million - Estonia (as of December 31, 2020: $0.39 million - U.S.).

In December of 2020, the Company entered into a three-year supply agreement with The Chemours Company (“Chemours”) to acquire natural monazite sands from the Chemours' Offerman Mineral Sand Plant in Georgia for processing at the Mill for the production of a marketable mixed RE carbonate as well as recovery of contained uranium, which is currently the Company’s only RE carbonate feed supplier. However, the Company is currently actively engaged in discussions to secure its own sources of monazite sands or other/additional REE bearing deposits.
The components of other income (loss) are as follows:
Years ended December 31,
202120202019
Interest income$44 $153 $482 
Change in value of investments accounted for at fair value7,106 1,835 (153)
Change in value of warrant liabilities(8,078)(5,436)3,726 
Change in value of Convertible Debentures— 155 291 
Foreign exchange gain (loss)(128)767 (46)
Department of Energy awards (1)
1,900 — — 
Other350 233 (322)
Other income (loss)$1,194 $(2,293)$3,978 
(1)See Part II, Item 7 "Outlook: Update on Rare Earth Element Initiative."
The components of accounts payable and accrued liabilities are as follows:
December 31, 2021December 31, 2020
Accounts payable$3,038 $1,108 
Payroll liabilities1,988 1,512 
Other accrued liabilities738 701 
Accounts payable and accrued liabilities$5,764 $3,321