Financial Results of Operations
For the results of continuing operations discussed below, we compare the results from operations for the three and six months ended June 30, 2022, to the results from operations for the three and six months ended June 30, 2021.
Three Months Ended June 30, 2022
Revenue from the sale of metals. We recorded $5.9 million in revenue from doré sales for each of the three months ended June 30, 2022, and June 30, 2021.
Cost of metals sold. For the three months ended June 30, 2022, and 2021, we recorded $4.6 million and $3.3 million of cost of metals sold, respectively. The higher costs for 2022 were expected as lower grades of material were being mined during the period as compared to the higher grades available during the same period of 2021.
Exploration expense. Our exploration expense, including property holding costs and allocated administrative expenses, totaled $2.8 million and $1.1 million for the three months ended June 30, 2022, and June 30, 2021, respectively. The higher exploration expense for 2022 is primarily related to costs in support of the potential restart of Velardeña, increased exploration at our Rodeo operation in Mexico and the Sarita Este property in Argentina.
Velardeña care and maintenance costs. We recorded $0.1 million for each of the three-month periods ended June 30, 2022, and June 30, 2021, for expenses related to care and maintenance at our Velardeña Properties as the result of the suspension of mining and processing activities in November 2015.
El Quevar project expense. We incurred $0.2 million and $0.1 million for the three-month periods ended June 30, 2022, and June 30, 2021, respectively, related to holding and evaluation costs for the Yaxtché deposit at our El Quevar project in Argentina. During each of the three months ended June 30, 2022, and June 30, 2021, approximately $0.2 million of costs actually incurred were offset by reimbursements from Barrick as discussed above.
Administrative expense. Administrative expenses totaled $1.3 million for the three months ended June 30, 2022. Administrative expenses, including costs associated with being a public company, are incurred primarily by our corporate activities in support of the Rodeo Property, Velardeña Properties, El Quevar project and our exploration portfolio. The $1.3 million of administrative expenses we incurred during the three months ended June 30, 2022, is comprised of $0.6 million of employee compensation and directors’ fees, $0.2 million of professional fees and $0.5 million of insurance, rents, travel expenses, utilities and other office costs. Administrative expenses totaled $1.0 million for the three months ended June 30, 2021. The $1.0 million of administrative expenses we incurred during the three months ended June 30, 2021 is comprised of $0.5 million of employee compensation and directors’ fees, $0.2 million of professional fees and $0.3 million of insurance, rents, travel expenses, utilities and other office costs.
Stock based compensation. During the three months ended June 30, 2022, we incurred approximately $0.2 million of expense related to stock-based compensation. Stock based compensation varies from period to period depending on the number and timing of shares granted, the type of grant, the market value of the shares on the date of grant and other variables. During the three months ended June 30, 2021, we incurred approximately $1.0 million of expense related to stock-based compensation. Stock based compensation was higher in the 2021 period due primarily to accelerated vesting of stock awards granted to executives and a consultant.
Reclamation and accretion expense. During each of the three months ended June 30, 2022, and June 30, 2021, we incurred approximately $0.1 million of reclamation expense related to the accretion of an asset retirement obligation at the Velardeña Properties and environmental liabilities associated with the Rodeo operation.
Other operating income (expense), net. We recorded $0.5 million of other operating income for the three months ended June 30, 2022, related to $0.4 million of amortization of deferred income related to the option agreement for the sale of the Santa Maria property, as discussed above and $0.1 million related to the sale of non-essential mining equipment in Mexico. We recorded $0.1 million of other operating income for the three months ended June 30, 2021, primarily related to the amortization of deferred income related to the option agreement for the sale of the Santa Maria property.
Depreciation, depletion and amortization. During the three-month periods ended June 30, 2022, and June 30, 2021, we incurred depreciation, depletion and amortization expense of approximately $0.1 million and $0.2 million, respectively.