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Segment reporting
 6 Months Ended
Jun. 30, 2023
Segment Reporting [Abstract]  
Segment reporting
14. Segment reporting:
The Company’s President & Chief Executive Officer and its Executive Chairman combine to form the Chief Operating Decision Maker (“CODM”) of the Company. The CODM evaluates how the Company allocates resources, assesses performance and makes strategic and operational decisions. Based upon such evaluation, the Company has determined that it has three reportable segments. The Company’s reportable segments are critical metals, data processing and energy storage.
Critical metals is focused on mineral project exploration and development with a focus on identifying and developing mineral projects, and ultimately mines, associated with the metals necessary for electrification.
The data processing segment provides data analytics, geophysical modeling, software licensing and artificial intelligence services for the mineral, oil & gas and water exploration industries.
The energy storage segment develops, manufactures and installs vanadium flow batteries for grid-scale energy storage.
Segment information for the periods presented is as follows:
Three months ended June 30, 2023Six months ended June 30, 2023
Critical
Metals		Data
Processing		Energy
Storage		TotalCritical
Metals		Data
Processing		Energy
Storage		Total
Revenue$— $42 $1,272 $1,314 $— $721 $1,272 $1,993 
Intersegment revenues— 15 — 15 — 63 — 63 
Loss (income) from operations44,648 746 1,991 47,385 80,807 1,145 4,022 85,974 
Segment Assets293,234 4,253 12,274 309,761 293,234 4,253 12,274 309,761 
Three months ended June 30, 2022Six months ended June 30, 2022
Critical
Metals		Data
Processing		Energy
Storage		TotalCritical
Metals		Data
Processing		Energy
Storage		Total
Revenue$— $229 $— $229 $— $6,991 $— $6,991 
Intersegment revenues— 96 — 96 — 139 — 139 
Loss (income) from operations27,103 953 1,630 29,686 47,883 (4,596)3,605 46,892 
Segment Assets309,574 7,259 24,161 340,994 309,574 7,259 24,161 340,994