Stockholders' Equity - Stock-based compensation expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Stock-based compensation expense
Stock-based compensation expense	$ 972,520	$ 627,349	$ 1,539,939	$ 1,364,633
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Stock-based compensation expense
Stock-based compensation expense	758,699	256,780	1,276,923	860,018
Location, Statement of Income, Balance [Axis]: dc:MineralRightsAndPropertiesExplorationExpense
Stock-based compensation expense
Stock-based compensation expense	213,821	370,569	263,016	504,615
RSUs \| Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Stock-based compensation expense
Stock-based compensation expense	446,650	295,448	743,479	683,941
RSUs \| Location, Statement of Income, Balance [Axis]: dc:MineralRightsAndPropertiesExplorationExpense
Stock-based compensation expense
Stock-based compensation expense	174,841	222,883	259,809	303,813
PSUs \| Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Stock-based compensation expense
Stock-based compensation expense	25,702	33,544	4,028	141,443
PSUs \| Location, Statement of Income, Balance [Axis]: dc:MineralRightsAndPropertiesExplorationExpense
Stock-based compensation expense
Stock-based compensation expense		82,653	(47,094)	111,375
Employee Stock Option \| Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense
Stock-based compensation expense
Stock-based compensation expense	286,347	(72,212)	529,416	34,634
Employee Stock Option \| Location, Statement of Income, Balance [Axis]: dc:MineralRightsAndPropertiesExplorationExpense
Stock-based compensation expense
Stock-based compensation expense	$ 38,980	$ 65,033	$ 50,301	$ 89,427