Gold Resource (GORO) 10-K/A 10 Mar 22 2021 FY Annual report (amended) Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 09, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-34857
Entity Registrant Name	Gold Resource Corporation
Entity Incorporation, State or Country Code	CO
Entity Tax Identification Number	84-1473173
Entity Address, Address Line One	7900 E. Union Ave,
Entity Address, Address Line Two	Suite 320,
Entity Address, City or Town	Denver,
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80237
City Area Code	303
Local Phone Number	320-7708
Title of 12(b) Security	Common Stock
Trading Symbol	GORO
Security Exchange Name	NYSEAMER
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		88,338,774
Entity Public Float			$ 192,056,111
Amendment Flag	true
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001160791
Current Fiscal Year End Date	--12-31
Auditor Name	Plante & Moran, PLLC
Auditor Firm ID	166
Auditor Location	Denver, Colorado
Amendment Description	This Amendment No. 1 to the Annual Report on Form 10-K/A amends our Annual Report on Form 10-K filed on March 10, 2022 (the “Original Filing”). The Original Filing inadvertently omitted the opinion of Plante & Moran, PLLC with regard to the Company’s internal control over financial reporting as of December 31, 2021 (the “ICFR Opinion”). With the exception of the inclusion of the ICFR Opinion, this Amendment No. 1 is identical to the Original Filing.

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 33,712	$ 25,405
Gold and silver rounds	589	671
Accounts receivable, net	8,672	4,226
Inventories, net	10,361	9,995
Promissory Note	3,885
Prepaid expenses and other current assets	1,696	2,576
Total current assets	58,915	42,873
Property, plant and mine development, net	156,771	62,511
Deferred tax assets, net		309
Other non-current assets	76	41
Total assets	215,762	105,734
Current liabilities:
Accounts payable	13,308	8,782
Income taxes payable, net	6,801	73
Mining royalty taxes payable, net	2,975	955
Accrued expenses and other current liabilities	6,575	2,275
Total current liabilities	29,659	12,085
Reclamation and remediation liabilities	3,112	3,098
Gold and silver stream agreements	42,560
Deferred tax liabilities, net	13,126
Contingent consideration	4,603
Other non-current liabilities	1,952	13
Total liabilities	95,012	15,196
Shareholders' equity:
Common stock - $0.001 par value, 200,000,000 shares authorized: 88,338,774 and 74,376,958 shares outstanding at December 31, 2021 and December 31, 2020, respectively	89	75
Additional paid-in capital	110,153	84,865
Retained earnings	17,563	12,653
Treasury stock at cost, 336,398 shares	(5,884)	(5,884)
Accumulated other comprehensive loss	(1,171)	(1,171)
Total shareholders' equity	120,750	90,538
Total liabilities and shareholders' equity	$ 215,762	$ 105,734

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
CONSOLIDATED BALANCE SHEETS
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares outstanding	88,338,774	74,376,958
Treasury stock, shares	336,398	336,398

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CONSOLIDATED STATEMENTS OF OPERATIONS
Sales, net	$ 125,196	$ 90,692	$ 120,301
Mine cost of sales:
Production costs	72,234	60,626	72,056
Depreciation and amortization	15,996	17,413	19,549
Reclamation and remediation	219	166	64
Total mine cost of sales	88,449	78,205	91,669
Mine gross profit	36,747	12,487	28,632
Costs and expenses:
General and administrative expenses	6,900	8,402	8,017
Exploration expenses	4,886	2,485	2,720
Restructuring expenses	2,423	1,316
Stock-based compensation	875	2,230	1,932
Realized and unrealized loss on zinc zero cost collar	3,000
Other expense (income), net	1,020	(1,188)	464
Total costs and expenses	19,104	13,245	13,133
Income (loss) before income taxes	17,643	(758)	15,499
Provision for income taxes	9,615	5,573	9,967
Net income (loss) from continuing operations	8,028	(6,331)	5,532
Net income from discontinued operations, net of income taxes		10,690	300
Net income	$ 8,028	$ 4,359	$ 5,832
Net income per common share:
Basic net income (loss) per common share from continuing operations	$ 0.11	$ (0.09)	$ 0.09
Diluted net income (loss) per common share from continuing operations	0.11	(0.09)	0.09
Basic net income per common share from discontinued operations		0.15
Diluted net income per common share from discontinued operations		0.15
Basic net income per common share	0.11	0.06	0.09
Diluted net income per common share	$ 0.11	$ 0.06	$ 0.09
Weighted average shares outstanding:
Basic	75,301,253	69,902,708	63,681,156
Diluted	75,608,627	70,686,243	64,032,990

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Shares	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2018		$ 121,602	$ 12,656	$ (5,884)	$ (1,171)	$ 127,262
Balance (in shares) at Dec. 31, 2018	59,186,829
Balance at Dec. 31, 2018	$ 59
Stock-based compensation		1,932				1,932
Net stock options exercised	$ 1	97				98
Net stock options exercised (in shares)	69,448
Common stock issued for vested restricted stock units (in shares)	121,060
Dividends declared			(1,612)			(1,612)
Issuance of stock, net of issuance costs	$ 6	24,540				24,546
Issuance of stock, net of issuance costs (in shares)	6,650,588
Net income loss			5,832			5,832
Balance at Dec. 31, 2019		148,171	16,876	(5,884)	(1,171)	158,058
Balance (in shares) at Dec. 31, 2019	66,027,925
Balance at Dec. 31, 2019	$ 66
Stock-based compensation		3,039				$ 3,039
Net stock options exercised (in shares)						0
Common stock issued for vested restricted stock units	$ 1					$ 1
Common stock issued for vested restricted stock units (in shares)	238,062
Dividends declared			(2,819)			(2,819)
Issuance of stock, net of issuance costs	$ 8	25,887				25,895
Issuance of stock, net of issuance costs (in shares)	8,447,369
Spin-off of Fortitude Gold Corporation		(92,232)	(5,763)			(97,995)
Net income loss			4,359			4,359
Balance at Dec. 31, 2020		84,865	12,653	(5,884)	(1,171)	90,538
Balance (in shares) at Dec. 31, 2020	74,713,356
Balance at Dec. 31, 2020	$ 75					75
Stock-based compensation		671				671
Net stock options exercised		288				$ 288
Net stock options exercised (in shares)	237,719					253,335
Common stock issued for vested restricted stock units (in shares)	75,262
Dividends declared			(3,118)			$ (3,118)
Surrender of stock for taxes due on vesting		(207)				(207)
Surrender of stock for taxes due on vesting (in shares)	(65,795)
Issuance of stock, net of issuance costs	$ 14	24,536				24,550
Issuance of stock, net of issuance costs (in shares)	13,714,630
Net income loss			8,028			8,028
Balance at Dec. 31, 2021		$ 110,153	$ 17,563	$ (5,884)	$ (1,171)	120,750
Balance (in shares) at Dec. 31, 2021	88,675,172
Balance at Dec. 31, 2021	$ 89					$ 89

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 8,028	$ 4,359	$ 5,832
Net income from discontinued operations		10,690	300
Net income (loss) from continuing operations	8,028	(6,331)	5,532
Adjustments to reconcile net income from continuing operations to net cash from operating activities:
Deferred income tax (benefit) expense	(2,216)	3,508	3,857
Depreciation and amortization	16,147	17,601	19,917
Stock-based compensation	875	2,230	1,932
Share-based compensation	877
Other operating adjustments	2,709	(404)	305
Changes in operating assets and liabilities:
Accounts receivable	(4,446)	4,136	(6,618)
Inventories	(708)	1,036	(1,976)
Prepaid expenses and other current assets	(267)	(405)	1,097
Other noncurrent assets	(8)	4	(3)
Accounts payable and other accrued liabilities	5,930	(588)	175
Mining royalty and income taxes payable, net	8,737	426	(106)
Net cash provided by operating activities from continuing operations		21,213	24,112
Net cash provided by operating activities	34,783
Cash flows from investing activities:
Capital expenditures	(20,610)	(12,811)	(16,936)
Cash acquisition costs, net of cash acquired	(2,363)
Proceeds from the sale of gold and silver rounds		4,846	2
Net cash used in investing activities from continuing operations		(7,965)	(16,934)
Net cash used in investing activities	(22,973)
Cash flows from financing activities:
Proceeds from the exercise of stock options	300		98
Proceeds from issuance of stock		25,795	24,449
Dividends paid	(3,366)	(2,790)	(1,491)
Cash related to the spin-off		(27,774)
Other financing activities	3
Other financing activities from discontinued operations		(452)	(2,019)
Net cash (used in) provided by financing activities	(3,063)	(5,221)	21,037
Effect of exchange rate changes on cash and cash equivalents	(440)	(528)	(455)
Cash flows from discontinued operations:
Net cash provided by operating activities		14,184	(2,705)
Net cash used in investing activities		(6,488)	(22,538)
Net increase in cash and cash equivalents	8,307	15,195	2,517
Cash and cash equivalents of continuing operations at beginning of period	25,405	10,210	7,693
Cash and cash equivalents of continuing operations at end of period	$ 33,712	$ 25,405	$ 10,210

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Information Continuing Operations
Interest expense paid		$ 20	$ 18
Income and mining taxes paid	$ 4,939	2,734	3,743
Non-cash investing activities:
Change in capital expenditures in accounts payable	684	(643)	624
Change in estimate for asset retirement costs	$ 7	$ 82	$ 443

Nature of Operations and Summar

Nature of Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Nature of Operations and Summary of Significant Accounting Policies
Nature of Operations and Summary of Significant Accounting Policies	1. Nature of Operations and Summary of Significant Accounting Policies ​ Nature of Operations ​ Gold Resource Corporation (the “Company”) was organized under the laws of the State of Colorado on August 24, 1998. The Company is a producer of doré containing gold and silver and metal concentrates that contain gold, silver, copper, lead, and zinc in Oaxaca, Mexico. ​ Acquisition ​ On December 10, 2021, the Company completed the acquisition of all the issued and outstanding common shares of Aquila Resources Inc. Aquila’s principal asset is its 100% interest in the Back Forty Project located in Menominee County, Michigan, USA. The Back Forty Project has a polymetallic (gold, silver, copper, silver, lead, and zinc) Volcanogenic Massive Sulfide deposit. The Back Forty Project controls surface and mineral rights through ownership, leases with the State of Michigan, and royalties with private parties. The Company considered the appropriate accounting treatment with regards to the Financial Accounting Standards Board’s Accounting Standards Codification (“ASC”) 805 Business Combinations and determined it was appropriate to account for this transaction as an asset acquisition. Please see Note 2 ​ Spin-Off ​ On December 31, 2020, The Company completed the spin-off of its wholly-owned subsidiary, Fortitude Gold Corporation and its subsidiaries (“FGC” or “Nevada Mining Unit”), into a separate, public company Note 21 ​ The spin-off was affected by the distribution of all of the outstanding shares of FGC common stock to the Company’s shareholders (the “Distribution”). The Company’s shareholders of record as of the close of business on December 28, 2020 (the “Record Date”) received one share of FGC common stock for every 3.5 ​ Significant Accounting Policies ​ Basis of Presentation ​ The consolidated financial statements included herein are expressed in United States dollars and conform to U.S. GAAP. The consolidated financial statements include the accounts of the Company, its Mexican subsidiary, Don David Gold Mexico S.A. de C.V., and its newly acquired Aquila subsidiaries (See Exhibit 21.1 for material subsidiaries). Intercompany accounts and transactions have been eliminated in consolidation. ​ Asset Acquisition ​ The Company considered the appropriate accounting treatment with regards to the Financial Accounting Standards Board’s ASC 805 Business Combinations for all material merger and acquisition transactions as they occur. The facts and circumstances of each transaction are evaluated to determine the appropriate accounting. Please see Note 2 ​ Discontinued Operations ​ The Company presents discontinued operations when there is a disposal of a component group or a group of components that in its judgment represents a strategic shift that will have a major effect on its operations and financial results. The Company aggregates the results of operations for discontinued operations into a single line item in the Consolidated Statements of Operations for all periods presented. General corporate overhead is not allocated to discontinued operations. See Note 20 ​ Segment Reporting ​ The Company has organized its operations into three geographic regions. The geographic regions include Oaxaca, Mexico, Michigan, U.S.A. and Corporate and Other. Oaxaca, Mexico represents the Company’s only production stage property. Michigan, U.S.A. is an advanced exploration stage property. The Company’s business activities that are not considered production stage or advanced exploration stage properties are included in Corporate and Other . ​ Use of Estimates ​ The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The more significant areas requiring the use of management estimates and assumptions relate to Mineral Resources and Mineral Reserves that are the basis for future cash flow estimates utilized in impairment calculations and units-of-production depreciation calculations; asset and liability valuation related to acquisitions; accounting for asset acquisitions; future metal prices, especially as it relates to zinc zero cost collar; environmental remediation, reclamation and closure obligations; estimates of recoverable gold and other minerals in stockpiles; write-downs of inventory, stockpiles to net realizable value; valuation allowances for deferred tax assets and liabilities; valuation of contingent considerations and gold and silver stream agreements, provisional amounts related to income tax effects of newly enacted tax laws; and stock-based compensation. Management routinely makes judgments and estimates about the effects of matters that are inherently uncertain and bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances. Actual results could differ from these estimates. ​ Reclassifications ​ Certain amounts presented in prior periods have been reclassified to conform to the current period presentation. Starting 2020, the Company showed Stock-based compensation as a separate line item in the Consolidated Statements of Operations. In 2019, Stock-based compensation was included with General and administrative expenses. The reclassifications had no material effect on the Company’s results of operations or financial condition. ​ Cash and Cash Equivalents ​ Cash and cash equivalents consist of all cash balances and are highly liquid. Cash held in Mexican Pesos or Canadian Dollars is converted to U.S. Dollars at the closing exchange rate on December 31, 2021. ​ Gold and Silver Rounds ​ The Company sponsored a physical dividend program which was concluded in 2021. Historically, the Company purchased gold and silver rounds on the open market in order to diversify its treasury and provide an option for shareholders to convert their dividends into rounds. At December 31, 2021, the Company held gold and silver rounds carried at quoted market value prices based on the daily London P.M. fix as of the balance sheet date. The Company considers rounds a highly liquid investment. ​ Accounts Receivable, net ​ Accounts receivable consists of trade receivables, which are recorded net of allowance for doubtful accounts, from the sale of doré and metals concentrates, as well an embedded derivative based on mark-to-market adjustments for outstanding provisional invoices based on forward metal prices. Please see Note 14 Note 19 ​ Inventories ​ The major inventory categories are set forth below: ​ Stockpile Inventories : ​ Concentrate Inventories ​ Doré Inventory: ​ Materials and Supplies Inventories ​ Write-downs of inventory are charged to production costs on the Consolidated Statements of Operations. ​ Promissory Note ​ The promissory note was acquired in the Aquila Transaction. In October 2021, Aquila sold its Wisconsin assets to Green Light Metals in return for a C$4.9 million ($3.9 million) promissory note. Under the promissory note, Green Light Metals is to pay C$0.9 million cash and deliver C$4.0 million in Green Light Metal shares once Green Light Metals goes public. The cash and shares will be delivered upon completion of Green Light Metals listing on the TSX and the shares are expected to represent approximately 18% of the total outstanding shares of Green Light Metals. Upon maturity on December 31, 2022, the shares of Green Light Metals will be recorded at fair value as available-for-sale securities. Due to the short maturity of the promissory note, the carrying amount approximates the fair value, and likewise, no interest and collateral is required. ​ Property, Plant and Mine Development ​ Land and Mineral Interests : ​ Mine Development : ​ Drilling costs incurred during the production phase for operational ore control are recorded as mine development and amortized using UOP. All other drilling and related costs are expensed as incurred. ​ Mine development costs are amortized using the UOP method based on estimated recoverable ounces in Mineral Reserves. ​ Property and Equipment ​ Construction in Progress ​ Depreciation and Amortization ​ ​ ​ ​ ​ ​ Range of Lives ​ Asset retirement costs ​ UOP ​ Furniture, computer and office equipment ​ 3 to 10 years ​ Light vehicles and other mobile equipment ​ 4 years ​ Machinery and equipment ​ UOP to 4 years ​ Mill facilities and related infrastructure ​ UOP ​ Mine development and mineral interests ​ UOP ​ ​ Impairment of Long-Lived Assets ​ The Company evaluates its long-lived assets for impairment when events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Asset impairment is considered to exist if the total estimated future cash flows on an undiscounted basis are less than the carrying amount of the asset. If an impairment is indicated, a determination is made whether an impairment has occurred. Impairment losses are measured either 1) as the excess of carrying value over the total discounted estimated future cash flows, or 2) by applying an expected fair value technique in the absence of an observable market price; losses are charged to expense on the Company’s Consolidated Statements of Operations. In estimating future cash flows, assets are grouped at the lowest level for which there are identifiable cash flows that are largely independent of future cash flows from other asset groups. ​ Existing Mineral Resources and Mineral Reserves are included when estimating the fair value in determining whether the assets are impaired. The Company’s estimates of future cash flows are based on numerous assumptions including expected gold and other commodity prices, production levels, capital requirements and estimated salvage values. It is possible that actual future cash flows will be significantly different from the estimates, as actual future quantities of recoverable minerals, gold and other commodity prices, production levels and costs, and capital requirements are each subject to significant risks and uncertainties. ​ Fair Value of Financial Instruments ​ The recorded amounts of cash and cash equivalents, gold and silver rounds, receivables from provisional concentrate sales and accounts payable approximate fair value because of the short maturity of those instruments. The recorded amounts for the zinc zero cost collar are based on the London Metal Exchange forward underlying price over a period from the trade date to the payment date. ​ Treasury Stock ​ Treasury stock represents shares of the Company’s common stock which have been repurchased on the open market at the prevailing market price at the time of purchase and have not been cancelled. Treasury stock is shown at cost as a separate component of equity. ​ Revenue Recognition ​ The Company recognizes revenue from doré and concentrate sales. ​ Doré sales ​ Concentrate sales ​ Production Costs ​ Production costs include labor and benefits, royalties, concentrate and doré shipping costs, mining costs, fuel and lubricants, legal and professional fees related to mine operations, stock-based compensation attributable to mine workers, materials and supplies, repairs and maintenance, explosives, site support, housing and food, insurance, reagents, travel, medical services, security equipment, office rent, tools and other costs that support mining operations. ​ Exploration Costs ​ Exploration costs are charged to expense as incurred. Costs to identify new Mineral Resources and to evaluate potential Mineral Resources are considered exploration costs. Exploration activities conducted within the defined Mineral Resources are capitalized. ​ Stock-Based Compensation ​ The Company accounts for stock-based compensation under the fair value recognition and measurement provisions of U.S. GAAP. Those provisions require all stock-based payments, including grants of stock options, RSUs, and DSUs to be measured based on the grant date fair value of the awards, with the resulting expense generally recognized on a straight-line basis in the Consolidated Statements of Operations over the period during which services are performed in exchange for the award. The majority of the awards are earned over a service period of three years. DSUs are earned immediately at grant and expected to be paid out in cash in the future. DSUs are considered liability instruments and marked-to-market each reporting period. The Company's estimates may be impacted by certain variables including, but not limited to, stock price volatility, employee stock option exercise behaviors, additional stock option grants, and estimates of forfeitures. ​ Reclamation and Remediation Costs ​ Reclamation costs are allocated to expense over the life of the related assets and are periodically adjusted to reflect changes in the estimated present value resulting from the passage of time and revisions to the estimates of either the timing or amount of the reclamation and remediation costs. Reclamation obligations are based in part on when the spending for an existing environmental disturbance will occur. The Company reviews, at least on an annual basis, the reclamation obligation. ​ Prior to 2014, the Company had been recognizing only reclamation and remediation obligations and all associated asset retirement costs were written off as the Company had not been reporting its proven and probable Mineral Reserves for its Don David Gold Mine. In 2014, the Company became a production stage company and therefore capitalized asset retirement costs along with the asset retirement obligation. Please see Note 11 ​ Accounting for reclamation and remediation obligations requires management to make estimates unique to each mining operation of the future costs expected to be incurred to complete the reclamation and remediation work required to comply with existing laws and regulations. Actual costs incurred in future periods could differ from amounts estimated. Additionally, future changes to environmental laws and regulations could increase the extent of reclamation and remediation work required. Any such increases in future costs could materially impact the amounts charged to operations for reclamation and remediation. ​ Accumulated Other Comprehensive Loss ​ Accumulated other comprehensive loss is presented in the consolidated statements of changes in shareholders’ equity. Accumulated other comprehensive loss is composed of foreign currency translation adjustment effects related to the historical adjustment when the functional currency was the Mexican peso for our Mexico subsidiary. This loss will remain on our Consolidated Balance Sheets until the sale or dissolution of our Mexico subsidiary. ​ Income and Mining Royalty Taxes ​ Income and Mining Royalty Taxes are computed using the asset and liability method. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial and tax reporting purposes and the effect of net operating loss and foreign tax credit carryforwards using enacted tax rates in effect in the years in which the differences are expected to reverse. Deferred tax assets are evaluated to determine if it is more likely than not that they will be realized. Please see Note 6 Net Income Per Share ​ Basic earnings per share is calculated based on the weighted average number of common shares outstanding for the period. Diluted income per share reflects the dilution that could occur if potentially dilutive securities, as determined using the treasury stock method, are converted into common stock. Potentially dilutive securities are excluded from the calculation when their inclusion would be anti-dilutive, such as periods when a net loss is reported or when the exercise price of the instrument exceeds the average fair market value of the underlying common stock. ​ Foreign Currency ​ The functional currency for all of the Company’s subsidiaries is the United States dollar (“U.S. dollar”). ​ Concentration of Credit Risk ​ The Company has considered and assessed the credit risk resulting from its concentrate sales and doré sales arrangements with its customers. In the event that the Company’s relationships with its customers are interrupted for any reason, the Company believes that it would be able to locate another entity to purchase its metals concentrates and doré bars; however, any interruption could temporarily disrupt the Company’s sale of its products and materially adversely affect operating results. ​ The Company’s Arista and Alta Gracia mines, which are located in the State of Oaxaca, Mexico, accounted for 100%of the Company’s total net sales from continuing operations for the years ended December 31, 2021, 2020 and 2019, respectively. ​ Some of the Company’s operating cash balances are maintained in accounts that currently exceed federally insured limits. The Company believes that the financial strength of the depositing institutions mitigates the underlying risk of loss. To date, these concentrations of credit risk have not had a significant impact on the Company’s financial position or results of operations. ​

Aquila Acquisition

Aquila Acquisition	12 Months Ended
	Dec. 31, 2021
Aquila Acquisition
Aquila Acquisition	2. Aquila Acquisition ​ On December 10, 2021, the Company completed the Definitive Arrangement Agreement pursuant to which GRC acquired all of the issued and outstanding common shares of Aquila Resources Inc. (the "Acquisition"). ​ Under the terms of the Acquisition, each holder of Aquila common shares (a “Shareholder”) received 0.0399 of GRC common share per Aquila share. Aquila had 343,725,063 issued and outstanding ​ The Company considered the appropriate accounting treatment with regards to ASC 805 Business Combinations and determined it was appropriate to account for this transaction as an asset acquisition. This determination was made as the Back Forty Project, as a single asset, made up more than 90% of the acquired assets and there were no significant outputs or substantive processes. The following table summarizes the allocation of purchase price to the assets acquired and liabilities assumed as of the date of acquisition (in thousands): ​ ​ ​ ​ AQUILA ACQUISITION ​ As of December 10, 2021 Consideration: ​ ​ Cash Consideration, including transaction costs $ 4,571 Stock Consideration (13,714,630 shares at $1.79 per share) ​ 24,549 Total Consideration: $ 29,120 ​ ​ ​ Value of net assets acquired: ​ ​ Assets: ​ ​ Cash and cash equivalents $ 2,208 Accounts receivable ​ 142 Promissory Note ​ 3,885 Prepaid expenses ​ 29 Security deposits ​ 27 Property, plant and mine development ​ 89,579 Total Assets ​ 95,870 Liabilities: ​ ​ Accounts payable and accrued liabilities ​ 3,314 Leases payable - current ​ 127 Exploration reclamation liability ​ 611 Gold and silver stream agreements ​ 42,421 Contingent consideration ​ 4,603 Leases payable - long term ​ 205 Deferred tax liability ​ 15,469 Total Liabilities ​ 66,750 Total net assets: $ 29,120 ​ The deferred tax liability assumes an Internal Revenue Code Section 338(g) election (“338(g) election”) will not be made to step up the tax basis of the Back Forty Project to the book basis. The Company is currently evaluating certain elections, including the 338(g) election, and post-transaction structuring strategies to optimize the tax impacts of the acquisition. The final determination to implement these elections or strategies may impact the Consolidated Statements of Operations in a future period. ​

Revenue

Revenue	12 Months Ended
	Dec. 31, 2021
Revenue
Revenue	3. Revenue ​ The Company derives its revenue from the sale of doré and concentrates. The following table presents the Company’s net sales disaggregated by source: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in thousands) ​ Doré sales, net ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ $ 8,120 ​ $ 8,719 ​ $ 6,763 Silver ​ ​ 678 ​ ​ 2,774 ​ ​ 2,439 Less: Refining charges ​ ​ (136) ​ ​ (233) ​ ​ (171) Total doré sales, net ​ ​ 8,662 ​ ​ 11,260 ​ ​ 9,031 Concentrate sales ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ ​ 32,593 ​ ​ 22,145 ​ ​ 27,184 Silver ​ ​ 26,095 ​ ​ 20,391 ​ ​ 21,347 Copper ​ ​ 13,495 ​ ​ 9,387 ​ ​ 9,930 Lead ​ ​ 13,442 ​ ​ 12,012 ​ ​ 16,116 Zinc ​ ​ 41,256 ​ ​ 36,451 ​ ​ 48,804 Less: Treatment and refining charges ​ ​ (11,349) ​ ​ (20,907) ​ ​ (13,825) Total concentrate sales, net ​ ​ 115,532 ​ ​ 79,479 ​ ​ 109,556 Realized gain embedded derivative, net ​ ​ 777 ​ ​ 138 ​ ​ 1,423 Unrealized gain (loss) - embedded derivative, net ​ ​ 225 ​ ​ (185) ​ ​ 291 Total sales, net ​ $ 125,196 ​ $ 90,692 ​ $ 120,301 ​

Gold and Silver Rounds

Gold and Silver Rounds	12 Months Ended
	Dec. 31, 2021
Gold and Silver Rounds
Gold and Silver Rounds	4. Gold and Silver Rounds ​ The Company holds gold and silver rounds which were formerly used in its dividend exchange program which was discontinued in 2021. The Company plans to sell the gold and silver rounds on the open market in 2022. During the year ended December 31, 2021, the Company distributed one (1) ounce of gold and thirty-nine (39) ounces of silver for a realized gain of $2 thousand in the dividend exchange program. Additionally, the Company used twelve (12) ounces of gold for employee recognition and one hundred forty-eight (148) ounces of silver rounds for marketing purposes. The realized gain is recorded in other income on a net basis. During the year ended December 31, 2020, the Company sold 1,641 ounces of gold rounds and 67,560 ounces of silver rounds for a realized gain of $1.0 million. ​ At December 31, 2021 and 2020, the Company’s holdings of rounds, using quoted market prices, consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2021 ​ As of December 31, 2020 ​ ​ Ounces ​ Per Ounce ​ Amount ​ Ounces ​ Per Ounce ​ Amount ​ ​ ​ ​ ​ ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ (in thousands) Gold ​ 176 ​ $ 1,820 ​ $ 320 ​ 189 ​ $ 1,888 ​ $ 357 Silver ​ 11,655 ​ $ 23.09 ​ ​ 269 ​ 11,842 ​ $ 26.49 ​ ​ 314 Total holdings ​ ​ ​ ​ ​ ​ $ 589 ​ ​ ​ ​ ​ ​ $ 671 ​

Inventories

Inventories	12 Months Ended
	Dec. 31, 2021
Inventories
Inventories	5. Inventories ​ At December 31, 2021 and 2020, current inventories consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Stockpiles - underground mine ​ $ - ​ $ 648 Stockpiles - open pit mine ​ ​ - ​ ​ 41 Concentrates ​ ​ 2,048 ​ ​ 1,919 Doré, net (1) ​ ​ 452 ​ ​ 459 Subtotal - product inventories ​ ​ 2,500 ​ ​ 3,067 Materials and supplies (2) ​ ​ 7,861 ​ ​ 6,928 Total ​ $ 10,361 ​ $ 9,995 ​ (1) Net of reserve of nil and $368 as of December 31, 2021 and 2020, respectively. (2) Net of reserve for obsolescence of $384 and $209 as of December 31, 2021 and 2020, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Taxes
Income Taxes	6. Income Taxes ​ The Company accounts for income taxes in accordance with the provisions of ASC 740, "Income Taxes" ("ASC 740") on a tax jurisdictional basis. The Company and its U.S. subsidiaries file U.S. tax returns and the Company’s foreign subsidiaries file tax returns in Mexico and in Canada. For financial reporting purposes, net income before income taxes includes the following components: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ (in thousands) ​ U.S. Operations ​ $ (6,369) ​ $ (7,196) ​ $ (6,338) ​ Foreign Operations ​ ​ 24,012 ​ ​ 6,438 ​ ​ 21,837 ​ Total income before income taxes ​ $ 17,643 ​ $ (758) ​ $ 15,499 ​ ​ The Company's income tax expense from continuing operations consists of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years ended December 31, ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ (in thousands) ​ Current taxes: ​ ​ ​ U.S. Federal ​ $ - ​ $ - ​ $ - ​ U.S. State ​ ​ 305 ​ ​ - ​ ​ - ​ Foreign ​ ​ 11,426 ​ ​ 3,294 ​ ​ 6,210 ​ Total current taxes ​ $ 11,731 ​ $ 3,294 ​ $ 6,210 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferred taxes: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Federal ​ $ - ​ $ 2,999 ​ $ 1,881 ​ U.S. State ​ ​ - ​ ​ - ​ ​ - ​ Foreign ​ ​ (2,116) ​ ​ (720) ​ ​ 1,876 ​ Total deferred taxes ​ $ (2,116) ​ $ 2,279 ​ $ 3,757 ​ Total income tax provision ​ $ 9,615 ​ $ 5,573 ​ $ 9,967 ​ ​ The provision for income taxes for the years ended December 31, 2021, 2020 and 2019, differs from the amount of income tax determined by applying the applicable United States statutory federal income tax rate to pre-tax income from operations as a result of the following differences: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ (in thousands) ​ Tax at statutory rates ​ $ 3,705 ​ $ (159) ​ $ 3,255 ​ Foreign rate differential ​ ​ 2,095 ​ ​ 558 ​ ​ 1,969 ​ GILTI Inclusion ​ ​ - ​ ​ (886) ​ ​ 2,173 ​ Changes in deferred tax assets ​ ​ (1,189) ​ ​ 3,919 ​ ​ 277 ​ Mexico mining tax ​ ​ 1,590 ​ ​ 280 ​ ​ 1,126 ​ Foreign exchange ​ ​ 535 ​ ​ 866 ​ ​ 255 ​ Stock option expiration ​ ​ 2,471 ​ ​ 449 ​ ​ 361 ​ Mexico withholding tax ​ ​ 679 ​ ​ 192 ​ ​ 374 ​ Deduction for inflation in Mexico ​ ​ (981) ​ ​ (550) ​ ​ (338) ​ U.S. State income tax ​ ​ 585 ​ ​ 127 ​ ​ 139 ​ Other ​ ​ 125 ​ ​ 777 ​ ​ 376 ​ Tax provision ​ $ 9,615 ​ $ 5,573 ​ $ 9,967 ​ ​ The following table sets forth deferred tax assets and liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, ​ ​ ​ 2021 ​ 2020 ​ ​ ​ (in thousands) ​ Non-current deferred tax assets: ​ ​ ​ ​ ​ ​ ​ Tax loss carryforward ​ $ 29,496 ​ $ 2,190 ​ Property and equipment ​ ​ 12,092 ​ ​ 10,355 ​ Share-based compensation ​ ​ 1,068 ​ ​ 4,018 ​ Foreign tax credits ​ ​ 4,089 ​ ​ 4,089 ​ Inventory ​ ​ 142 ​ ​ 79 ​ Foreign mining tax ​ ​ 793 ​ ​ 199 ​ Accounts payable ​ ​ 2,708 ​ ​ 912 ​ Employee profit sharing obligation ​ ​ 566 ​ ​ - ​ Zinc derivatives ​ ​ 608 ​ ​ - ​ Other ​ ​ 362 ​ ​ 377 ​ Total deferred tax assets ​ ​ 51,924 ​ ​ 22,219 ​ Valuation allowance ​ ​ (36,933) ​ ​ (10,592) ​ Deferred tax assets after valuation allowance ​ $ 14,991 ​ $ 11,627 ​ Deferred tax liability – Property, plant and mine development ​ ​ (28,117) ​ ​ (11,318) ​ Net deferred tax (liability) asset ​ $ (13,126) ​ $ 309 ​ ​ In accordance with ASC 740, the Company presents deferred tax assets net of its deferred tax liabilities on a tax jurisdictional basis on its Consolidated Balance Sheets. The net deferred tax liability of $13.1 million as of December 31, 2021 is primarily related to the Aquila acquisition. The Company is currently evaluating certain elections and post-transaction structuring strategies to optimize the tax impacts of the acquisition. The final determination to implement these elections or strategies may impact the Consolidated Statements of Operations in a future period. ​ The Company evaluates the evidence available to determine whether a valuation allowance is required on deferred tax assets. As of December 31, 2021, the Company determined that a valuation allowance of $36.9 million was necessary due to the uncertain utilization of specific deferred tax assets, primarily net operating loss carryforwards, in both U.S. and Canada. $27.5 million of the valuation allowance related to the Aquila acquisition. As of December 31, 2020, the Company determined that a full valuation allowance on the US deferred tax assets was necessary as a result of the spin-off of Fortitude Gold Corporation and its subsidiaries. ​ At December 31, 2021, the Company has U.S. federal loss carryforwards of $80.7 million, of which $33.9 million have no expiration date, and $46.8 million that expire at various dates between 2027 and 2037; U.S. Foreign Tax Credits of $4.1 million that expire at various dates between 2023 and 2026; federal capital loss carryforwards of $0.4 million that expire at various dates between 2022 and 2024; state of Colorado tax loss carryforwards of $40.5 million, of which $30.8 million expire at various dates between 2022 and 2037 and $9.8 million that have no expiration; state of Michigan tax loss carryforwards of $51.6 million, of which $24.4 million have no expiration and $27.2 million expire at various dates between 2022 and 2027; and Canadian tax loss carryforwards of $30.8 million that expire between 2026 and 2041. ​ Mexico Mining Taxation ​ Mining entities in Mexico are subject to two mining duties, in addition to the 30% Mexico corporate income tax: (i) a “special” mining duty of 7.5% of taxable income as defined under Mexican tax law (also referred to as “mining royalty tax”) on extraction activities performed by concession holders, and (ii) the “extraordinary” mining duty of 0.5% on gross revenue from the sale of gold, silver and platinum. The mining royalty tax is generally applicable to earnings before income tax, depreciation, depletion, amortization, and interest. In calculating the mining royalty tax, there are no deductions related to depreciable costs from operational fixed assets, but exploration and prospecting depreciable costs are deductible when incurred. Both duties are tax deductible for income tax purposes. As a result, our effective tax rate applicable to the Company’s Mexican operations is substantially higher than Mexico statutory rate. ​ The Company periodically transfers funds from its Mexican wholly-owned subsidiary to the U.S. in the form of dividends. Mexico requires a 10% withholding tax on dividends on all post-2013 earnings. The Company began distributing post-2013 earnings from Mexico in 2018. According to the existing U.S. – Mexico tax treaty, the dividend withholding tax between these countries is limited to 5% if certain requirements are met. The Company determined that it had met such requirements and paid a 5% withholding tax on dividends received from Mexico, and as a result, paid $0.5 million, $0.2 million, and $0.4 million for years ending December 31, 2021, 2020 and 2019, respectively. ​ Other Tax Disclosures ​ The U.S. Treasury Department issued final regulations in July 2020 concerning global intangible low-taxed income, commonly referred to as GILTI tax and introduced by the Tax Act of 2017. The GILTI provisions impose a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. The final tax regulations allow income to be excluded from GILTI tax that are subject to an effective tax rate higher than 90% of the U.S. tax rate. The Company determined that it was not subject to GILTI tax in 2019 due to this high tax exception rule, therefore the Company recorded the reversal of the prior year GILTI tax expense that resulted in $0.9 million tax benefit for the year ended December 31, 2020. ​ As of both December 31, 2021 and 2020, the Company believes that it has no unrecognized tax benefits. If the Company were to determine there was an unrecognized tax benefit, the Company would recognize the liability and related interest and penalties within income tax expense.

Prepaid Expenses and Other Curr

Prepaid Expenses and Other Current Assets	12 Months Ended
	Dec. 31, 2021
Prepaid Expenses And Other Current Assets
Prepaid Expenses and Other Current Assets	7 . Prepaid Expenses and Other Current Assets ​ At December 31, 2021 and 2020, prepaid expenses and other current assets consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Advances to suppliers ​ $ 188 ​ $ 374 Prepaid insurance ​ ​ 1,222 ​ ​ 709 IVA taxes receivable, net ​ ​ 20 ​ ​ 846 Other current assets ​ ​ 266 ​ ​ 647 Total ​ $ 1,696 ​ $ 2,576 ​ IVA taxes receivable, net is a value added (“IVA”) tax in Mexico assessed on purchases of materials and services and sales of products. Likewise, businesses owe IVA taxes as the business sells a product and collects IVA taxes from its customers. Businesses are generally entitled to recover the taxes they have paid related to purchases of materials and services, either as a refund or credit to IVA tax payable. Amounts recorded as IVA taxes in the consolidated financial statements represent the net estimated IVA tax receivable or payable, since there is a legal right of offset of IVA taxes.

Property, Plant and Mine Develo

Property, Plant and Mine Development, net	12 Months Ended
	Dec. 31, 2021
Property, Plant and Mine Development, net
Property, Plant and Mine Development, net	8. Property, Plant and Mine Development, net ​ At December 31, 2021 and 2020, property, plant and mine development consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Asset retirement costs ​ $ 1,065 ​ $ 1,064 Construction-in-progress (1) ​ ​ 15,854 ​ ​ 7,158 Furniture and office equipment ​ ​ 1,685 ​ ​ 1,839 Land ​ ​ 9,230 ​ ​ 230 Mineral interest ​ ​ 79,964 ​ ​ - Light vehicles and other mobile equipment ​ ​ 2,224 ​ ​ 2,192 Machinery and equipment ​ ​ 33,213 ​ ​ 31,227 Mill facilities and infrastructure ​ ​ 24,973 ​ ​ 24,407 Mine Development ​ ​ 92,138 ​ ​ 83,859 Software and licenses ​ ​ 1,592 ​ ​ 1,619 Subtotal (2) ​ ​ 261,938 ​ ​ 153,595 Accumulated depreciation and amortization ​ ​ (105,167) ​ ​ (91,084) Total ​ $ 156,771 ​ $ 62,511 ​ (1) Primarily related to the dry stack filtration plant. (2) Includes capital expenditures in accounts payable and accruals of $1.7 million and $1.0 at December 31, 2021 and 2020, respectively. The Company recorded depreciation and amortization expense for the years ended December 31, 2021, 2020 and 2019 of $16.1 million, $17.6 million, and $19.9 million, respectively.

Accrued Expenses and Other Liab

Accrued Expenses and Other Liabilities	12 Months Ended
	Dec. 31, 2021
Accrued Expenses and Other Liabilities
Accrued Expenses and Other Liabilities	9. Accrued Expenses and Other Liabilities ​ At December 31, 2021 and 2020, accrued expenses and other current and non-current liabilities consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Accrued royalty payments ​ ​ 1,743 ​ ​ 1,796 Dividends payable ​ ​ - ​ ​ 247 Zinc derivatives ​ ​ 1,844 ​ ​ - Employee profit sharing obligation ​ ​ 1,888 ​ ​ - Other payables ​ ​ 1,100 ​ ​ 232 Total accrued expenses and other current liabilities ​ $ 6,575 ​ $ 2,275 ​ ​ ​ ​ ​ ​ ​ Accrued non-current labor obligation ​ ​ 920 ​ ​ - Deferred stock unit compensation liability ​ ​ 206 ​ ​ - Other long-term liabilities ​ ​ 826 ​ ​ 13 Total other non-current liabilities ​ $ 1,952 ​ $ 13 ​ In 2021, the Company entered into zinc zero cost collars consisting of call and put options on the same volume to manage its near-term exposure to cash flow variability from zinc price risks. As of December 31, 2021, the Company had $1.8 million liability related to the program. ​ On April 23, 2021, a decree that reforms labor outsourcing in Mexico was published in the Federation’s Official Gazette. This new decree amends the outsourcing provisions, whereby operating companies will no longer be able to source their labor resources used to carry out the core business functions from service entities or third-party providers. ​ Under Mexican law, employees are entitled to receive statutory profit sharing (Participacion a los Trabajadores de las Utilidades or “PTU”) payments. The required cash payment to employees in the aggregate is equal to 10% of their employer’s profit subject to PTU, which differs from profit determined under U.S. GAAP. In the past, the Company was not subject to PTU payments, as it had been sourcing its labor resources through a third-party service provider. ​ As a result of adopting the new legislation in 2021, $1.9 million for PTU was recorded in current liabilities and production cost, as well as $0.9 million for statutory employee severance benefits recorded in other long-term liabilities and other expenses.

Gold and Silver Stream Agreemen

Gold and Silver Stream Agreements	12 Months Ended
	Dec. 31, 2021
Gold and Silver Stream Agreements
Gold and Silver Stream Agreements	10. Gold and Silver Stream Agreements ​ The following table presents the Company’s liabilities related to the Gold and Silver Stream Agreements as of December 31, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2019 ​ ​ (in thousands) Liability related to the Gold Stream Agreement ​ $ 20,364 ​ $ - Liability related to the Silver Stream Agreement ​ ​ 22,196 ​ ​ - Total liability ​ $ 42,560 ​ $ - ​ Periodic interest expense will be incurred based on an implied interest rate. The implied interest rate is determined based on the timing and probability of future production and an 8% discount rate. Interest expense will be recorded to the Consolidated Statements of Operations and the gold and silver stream agreement liability on the Consolidated Balance Sheet. ​ Gold Streaming Agreement ​ In November 2017, Aquila completed a financing transaction with Osisko Bermuda Limited (“OBL”), a wholly-owned subsidiary of Osisko Gold Royalties Ltd (TSX & NYSE: OR), pursuant to which OBL agreed to commit approximately $55 million to Aquila through a gold stream purchase agreement. In June 2020, Aquila amended its agreement with Osisko, reducing the total committed amount to $50 million as well as adjusting certain milestone dates under the gold stream to align with the current project development timeline. Aquila had received a total of $20 million of the committed funds at the time of the Gold Resource Corporation acquisition. Remaining deposits from OBL are $5 million upon receipt of permits required for the development and operation of the Back Forty Project and $25 million upon the first drawdown of an appropriate project debt finance facility. OBL has been provided a general security agreement over the Back Forty Project which consists of the subsidiaries of Gold Resource Acquisition CO, a 100% owned subsidiary of Gold Resource Corporation. The initial term of the agreement is for 40 years, automatically renewable for successive ten-year periods. The agreement is subject to certain operating and financial covenants, which are in good standing as of December 31, 2021. ​ The $20 million received from OBL through December 31, 2021 is shown as a long-term liability on the Consolidated Balance Sheet along with an implied interest rate. The implied interest rate is applied on OBL advance payments and calculated on the total expected life-of-mine production to be deliverable (as supported in the Back Forty Project Preliminary Economic Assessment) at the five-year average street consensus metal prices (based on the median) evaluated at December 31, 2021 and is discounted at 8.0%. As the remaining $30 million deposit is subject to the completion of certain milestones and the satisfaction of certain other conditions, this amount is not reflected on the Consolidated Balance Sheet. ​ Per the terms of the gold stream agreement, OBL will purchase 18.5% of the refined gold from Back Forty (the “Threshold Stream Percentage”) until the Company has delivered 105,000 ounces of gold (the “Production Threshold”). Upon satisfaction of the Production Threshold, the Threshold Stream Percentage will be reduced to 9.25% of the refined gold (the “Tail Stream”). In exchange for the refined gold delivered under the Stream Agreement, OBL will pay the Company ongoing payments equal to 30% of the spot price of gold on the day of delivery, subject to a maximum payment of $600 per ounce. Where the market price of gold is greater than price paid, the difference realized from the sale of the gold will be applied against the deposit received from Osisko. (See Note 12 Commitments and Contingencies. ​ Silver Stream Agreement ​ Through a series of contracts, Aquila executed a silver stream agreement with OBL to purchase 85% of the silver produced and sold at the Back Forty Project. A total of $17.2 million has been advanced under the agreement as at December 31, 2021. There are no future deposits remaining under the agreement. The initial term of the agreement is for 40 years, automatically renewable for successive ten-year periods. The agreement is subject to certain operating and financial covenants, which are in good standing as of December 31, 2021. ​ Per the terms of the silver stream agreement, OBL will purchase 85% of the silver produced from the Back Forty Project at a fixed price of $4 per ounce of silver. Where the market price of silver is greater than $4 per ounce, the difference realized from the sale of the silver will be applied against the deposit received from Osisko. ​ The $17.2 million received from OBL through December 31, 2021 is shown as a long-term liability on the Consolidated Balance Sheet and includes an implied interest rate. (See Note 12 Commitments and Contingencies.

Reclamation and Remediation

Reclamation and Remediation	12 Months Ended
	Dec. 31, 2021
Reclamation and Remediation
Reclamation and Remediation	11. Reclamation and Remediation ​ The following table presents the changes in the Company’s reclamation and remediation obligations for the years ended December 31, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Reclamation liabilities – balance at beginning of period ​ $ 1,890 ​ $ 2,003 Foreign currency exchange gain ​ ​ (57) ​ ​ (113) Reclamation liabilities – balance at end of period ​ ​ 1,833 ​ ​ 1,890 ​ ​ ​ ​ ​ ​ ​ Asset retirement obligation – balance at beginning of period ​ ​ 1,208 ​ ​ 1,105 Changes in estimate ​ ​ - ​ ​ 82 Accretion ​ ​ 109 ​ ​ 79 Foreign currency exchange gain ​ ​ (38) ​ ​ (58) Asset retirement obligation – balance at end of period ​ ​ 1,279 ​ ​ 1,208 Total period end balance ​ $ 3,112 ​ $ 3,098 ​ The Company’s undiscounted reclamation liabilities of $1.8 million and $1.9 million as of December 31, 2021 and 2020, respectively, are related to DDGM in Mexico. These represent reclamation liabilities that were expensed through 2013 before proven and probable Mineral Reserves were established and the Company was considered to be a development stage entity; therefore, most of the costs, including asset retirement costs, were not allowed to be capitalized as part of our property, plant and mine development. The Company’s asset retirement obligations reflect the additions to the asset for reclamation and remediation costs in property, plant & mine development, post 2013 development stage status, which were discounted using a credit adjusted risk-free rate of 8%. As of December 31, 2021, and 2020, the Company’s asset retirement obligation related to the Don David Gold Mine in Mexico was $1.3 million and $1.2 million, respectively. ​ The Company has recoded $0.6 million in reclamation liabilities to remediate exploration drill holes at the Back Forty Project in Michigan, USA. The amount is recorded in other non-current liabilities. Upon completion of the definitive feasibility study and the related mine closure plan, an asset for asset retirement obligation and corresponding liability for reclamation and remediation will be recorded.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies
Commitments and Contingencies	12. Commitments and Contingencies ​ As of December 31, 2021 and 2020, the Company had equipment purchase commitments aggregating approximately $0.4 million. ​ Contingent Consideration ​ With the Aquila acquisition, the Company assumed contingent consideration. On December 30, 2013, Aquila’s shareholders approved the acquisition of 100% of the shares of HudBay Michigan Inc. (“HMI”), a subsidiary of HudBay Minerals Inc. (“HudBay”), effectively giving Aquila 100% ownership in the Back Forty Project (the “HMI Acquisition”). Pursuant to the HMI Acquisition, HudBay’s 51% interest in the Back Forty Project was acquired in consideration for the issuance of common shares of Aquila, future milestone payments tied to the development of the Back Forty Project and a 1% net smelter return royalty on production from certain land parcels in the project. The issuance of shares and 1% net smelter obligations were settled before the Company acquired Aquila. ​ The contingent consideration is composed of the following: ​ The value of future installments is based on C$9 million tied to development of the Back Forty project as follows: a. C$3 million payable on completion of any form of financing for purposes including the commencement of construction of Back Forty, up to 50% of the C$3 million can be paid, at the Company’s option in Gold Resource Corporation shares with the balance payable in cash (if as of November 2023 this milestone has not been achieved, HMI has the right to repurchase a 51% ownership in the Back Forty Project); b. C$2 million payable in cash 90 days after the commencement of commercial production; c. C$2 million payable in cash 270 days after the commencement of commercial production, and; d. C$2 million payable in cash 450 days after the commencement of commercial production. ​ The value of the contingent consideration at December 31, 2021 was $4.6 million. The contingent consideration will be adjusted for the time value of money and the likelihood of the milestone payments. Any future changes in the value of the contingent consideration will be recognized in the Consolidated Statements of Operations. ​ Other Contingencies ​ The Company has certain other contingencies resulting from litigation, claims, and other commitments and is subject to a variety of environmental and safety laws and regulations incident to the ordinary course of business. The Company currently has no basis to conclude that any or all of such contingencies will materially affect its financial position, results of operations or cash flows. However, in the future, there may be changes to these contingencies, or additional contingencies may occur, any of which might result in an accrual or a change in current accruals recorded by the Company, and there can be no assurance that their ultimate disposition will not have a material adverse effect on the Company’s financial position, results of operations or cash flow. ​ With the successful acquisition of Aquila Resources Inc. on December 10, 2021, the Company assumed substantial liabilities that relate to the gold and silver stream agreements with Osisko Bermuda Limited. Under the agreements, Osisko deposited a total of $37.2 million upfront in exchange for a portion of the future gold and silver production from the Back Forty Project. The stream agreements contain customary provisions regarding default and security. In the event that our subsidiary defaults under the stream agreements, including achieving commercial production at an agreed upon date, it may be required to repay the deposit plus accumulated interest at a rate agreed with Osisko. If it fails to do so, Osisko may be entitled to enforce their remedies as a secured party and take possession of the assets that comprise the Back Forty Project. ​ ​

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2021
Shareholders' Equity
Shareholders' Equity	13. Shareholders’ Equity ​ In the year ended December 31, 2021, the Company declared dividends of $3.1 million and paid dividends of $3.4 million, or $0.0433 per share. The Company declared and paid dividends of $2.8 million, or $0.04 million per share for the year ended December 31, 2020. ​ On April 3, 2018, the Company entered into an At-The-Market Offering Agreement (the “ATM Agreement”) with an investment banking firm (“Agent”) pursuant to which the Agent agreed to act as the Company’s sales agent with respect to the offer and sale from time to time of the Company’s common stock having an aggregate gross sales price of up to $75.0 million (the “Shares”), which was subsequently renewed in June 2020. The ATM Agreement will remain in effect until the earlier of (i) June 3, 2023 or (ii) the date that the ATM Agreement is terminated in accordance with its terms An aggregate of nil , 8,421,259 shares, and 6,625,588 shares of the Company’s common stock were sold through the ATM Agreement during the years ended December 31, 2021, 2020 and 2019, for net proceeds to the Company, after deducting the Agent’s commissions and other expenses, of $ 0.0 million, $ 25.8 million, and $ 24.4 million, respectively. ​ During the year ended December 31, 2021, the Company issued 13,714,630 shares of common stock in connection with the Aquila acquisition at a price of $1.79 per share in exchange for 100% of Aquila’s common shares. During the year ended December 31, 2020, the Company issued 26,110 shares of its common stock at a price of $3.83 per share in connection with its purchase of the Golden Mile project (a Nevada Mining Unit Asset). During the year ended December 31, 2019, the Company issued 25,000 shares of its common stock at a value of $3.88 per share as payment for a one-year investor relations agreement with a third-party.

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2021
Derivatives
Derivatives	14. Derivatives ​ Embedded Derivatives ​ Concentrate Sales ​ Concentrate sales contracts contain embedded derivatives due to the provisional pricing terms for shipments pending final settlement. At the end of each reporting period, the Company records an adjustment to accounts receivable and revenue to reflect the mark-to-market adjustments for outstanding provisional invoices based on forward metal prices. Please see Note 20 ​ The following table summarizes the Company’s unsettled sales contracts at December 31, 2021, with the quantities of metals under contract subject to final pricing occurring through February 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ Silver ​ Copper ​ Lead ​ Zinc ​ ​ Total ​ ​ (ounces) ​ (ounces) ​ (tonnes) ​ (tonnes) ​ (tonnes) ​ ​ ​ Under contract ​ ​ 3,014 ​ ​ 215,786 ​ ​ 275 ​ ​ 1,503 ​ ​ 4,180 ​ ​ ​ Average forward price (per ounce or tonne) ​ $ 1,803 ​ $ 23.18 ​ $ 9,598 ​ $ 2,311 ​ $ 3,356 ​ ​ ​ Unsettled sales contracts value (in thousands) ​ $ 5,434 ​ $ 5,002 ​ $ 2,639 ​ $ 3,473 ​ $ 14,028 ​ $ 30,576 ​ Other Derivatives ​ Zinc zero cost collar ​ Derivative instruments that are not designated as hedging instruments are required to be recorded on the balance sheet at fair value. Changes in fair value will impact the Company’s earnings through mark-to-market adjustments until the physical commodity is delivered or the financial instrument is settled. The fair value does not reflect the realized or cash value of the instrument. ​ Effective May 18, 2021, GRC entered into Trading Agreement with Auramet International LLC that govern nonexchange traded, over-the-counter, spot, forward and option transactions on both a deliverable and non-deliverable basis involving various metals and currencies. In 2021, the Company had a realized loss of $1.2 million and an unrealized loss of $1.8 million related to the program. The agreement allows for the trader to require cash collateral should market value of contracts be above uncommitted trading line. As of December 31, 2021, our remaining hedge program was in an acceptable position to the trading line, thus there was no collateral required. ​ As of December 31, 2021, the Company’s derivatives not designated as hedges consist of zinc zero cost collars used to manage its near-term exposure to cash flow variability from zinc price risks. A zero cost collar is a combination of two options: a sold call option and a purchased put option. As of December 31, 2021, the Company maintained an outstanding derivative position of 5,700 tonnes for January 2022 through December 2022 with an average ceiling price of $3,342 per tonne of zinc and a floor price of $3,047 per tonne of zinc. ​ Derivatives are carried at fair value and on a net basis as a legal right of offset exists with the same counterparty. Otherwise, any fair value gains or losses are recognized in earnings in the current period. The fair value does not reflect the realized or cash value of the instrument. Mark-to-market adjustments are made until the physical commodity is delivered or the financial instrument is settled. The December 2021 London Metal Exchange (“LME”) average zinc price of $3,408 exceeded the call option ceiling of $3,066, resulting in a realized loss of $478 thousand. The mark-to-market adjustment on the remaining 5,700 tonnes resulted in an unrealized loss of $1.8 million recorded in the Consolidates Statements of Operations and in Accrued expenses and other current liabilities in the Consolidated Balance Sheets. Subsequent to year end, on January 4, 2022, the Company executed additional derivatives of zero cost collars to manage its near-term exposure to cash flow variability from zinc price risks through December 2022. The Company sold call options to establish the ceiling price of $3,500 per tonne of zinc that the Company will receive for the contracted zinc volume of 3,150 tonnes for April 2022 through December 2022. The purchased put establishes the floor price of $3,200 per tonne of zinc that we will receive for the same contracted tonnes and period of time. ​ The Company manages credit risk by selecting counterparties that it believes to be financially strong, by entering into netting arrangements with counterparties and by requiring other credit risk mitigants, as appropriate. The Company actively evaluates the creditworthiness of its counterparties, assigns appropriate credit limits, and monitors credit exposures against those assigned limits.

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2021
Employee Benefits
Employee Benefits	15. Employee Benefits ​ Effective October 2012, the Company adopted a profit sharing plan (the “Plan”) which covers all U.S. employees. The Plan meets the requirements of a qualified retirement plan pursuant to the provisions of Section 401(k) of the Internal Revenue Code. The Plan also provides eligible employees the opportunity to make tax deferred contributions to a retirement trust account up to 50% of their qualified wages, subject to the IRS annual maximums. ​ On April 23, 2021, a decree that reforms labor outsourcing in Mexico was published in the Federation’s Official Gazette. This new decree amends the outsourcing provisions, whereby operating companies will no longer be able to source their labor resources used to carry out the core business functions from service entities or third-party providers. Under Mexican law, employees are entitled to receive statutory profit sharing (Participacion a los Trabajadores de las Utilidades or “PTU”) payments. The required cash payment to employees in the aggregate is equal to 10% of their employer’s profit subject to PTU, which differs from profit determined under U.S. GAAP. Please see Note 9

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2021
Stock-Based Compensation
Stock-Based Compensation	16. Stock-Based Compensation ​ The Gold Resource Corporation 2016 Equity Incentive Plan (the “Incentive Plan”) allows for the issuance of up to 5 million shares of common stock in the form of incentive and non-qualified stock options, stock appreciation rights, restricted stock units, stock grants, stock units, performance shares, performance share units and performance cash. Additionally, pursuant to the terms of the Incentive Plan, any award outstanding under the prior plan that is terminated, expired, forfeited, or canceled for any reason, will be available for grant under the Incentive Plan. ​ Effective January 1, 2021, the Company’s Board of Directors, on the recommendation of the Compensation Committee, implemented a program to issue deferred stock units. DSUs are a qualifying instrument under the terms of the Company’s Incentive Plan and therefore do not require additional shareholder approval. The vesting and settlement terms of the DSUs are determined by the Compensation Committee at the time the DSUs are awarded. ​ 130,000 DSUs were granted to the Board of Directors during the period ended March 31, 2021 and are redeemable in cash or shares at the earlier of 10 years or upon the eligible directors’ termination. Termination is deemed to occur on the earliest of (1) the date of voluntary resignation or retirement of the director from the Board; (2) the date of death of the director; or (3) the date of removal of the director from the Board whether by shareholder resolution, failure to achieve re-election or otherwise; and on which date the director is not a director or employee of the Company or any of its affiliates. These awards contain a cash settlement feature and are therefore classified as a liability and are marked to fair value each reporting period. The Company may also issue DSUs for directors in lieu of board fees at their request. As of December 31, 2021, there were 1,960 DSUs granted in lieu of board fees that are also subject to mark-to-market adjustment. As of December 31, 2021, the Company recorded $0.2 million of other non-current liability ​ Stock-Based Compensation Expense ​ Stock-based compensation expense for stock options, RSUs, and DSUs is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ 2021 ​ 2020 ​ 2019 ​ (in thousands) Stock options $ 549 ​ $ 1,956 ​ $ 1,458 Restricted stock units ​ 120 ​ ​ 1,083 ​ ​ 474 Deferred stock units ​ 206 ​ ​ - ​ ​ - Total $ 875 ​ $ 3,039 ​ $ 1,932 ​ In 2020, in connection with the Fortitude Gold Spin-Off, the Company accelerated the vesting on 105,568 stock options and 127,068 RSU’s for four employees which resulted in $0.8 million of incremental stock-based compensation, included in restructuring expense. The estimated unrecognized stock-based compensation expense from unvested options and RSUs as of December 31, 2021 was approximately $0.7 million and $0.3 million, respectively, and is expected to be recognized over the remaining vesting periods of up to three years. The Company has a short-term incentive plan (“STIP”) for its executive officers that provides for the grant of either cash or stock-based bonus awards payable upon achievement of specified performance metrics. As of December 31, 2021 we accrued $0.7 million related to the STIP program. As of December 31, 2020, there were no accruals related to the STIP Stock Options ​ A summary of stock option activity under the Incentive Plan for the years ended December 31, 2021 and 2020 is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Shares ​ Weighted Average Exercise Price (per share) ​ Weighted Average Remaining Contractual Term (in years) ​ Aggregate Intrinsic Value (thousands) Outstanding as of December 31, 2019 ​ 4,564,735 ​ $ 8.54 ​ 5.09 ​ $ 4,513 Granted ​ 100,000 ​ ​ 3.45 ​ - ​ ​ ​ Exercised ​ - ​ ​ - ​ - ​ ​ ​ Expired ​ (486,666) ​ ​ 13.82 ​ - ​ ​ ​ Forfeited ​ (4,901) ​ ​ 6.57 ​ - ​ ​ ​ Outstanding as of December 31, 2020 ​ 4,173,168 ​ $ 6.83 ​ 3.58 ​ $ 1,324 Granted ​ 600,000 ​ ​ 3.22 ​ - ​ ​ ​ Exercised ​ (253,335) ​ ​ 1.31 ​ - ​ ​ ​ Expired ​ (2,035,966) ​ ​ 9.14 ​ - ​ ​ ​ Forfeited ​ (29,167) ​ ​ 5.89 ​ - ​ ​ ​ Outstanding as of December 31, 2021 ​ 2,454,700 ​ $ 4.62 ​ 4.58 ​ $ 109 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Vested and exercisable as of December 31, 2021 ​ 1,848,033 ​ $ 5.06 ​ 3.17 ​ $ 109 ​ The weighted-average fair value of options per share granted during the years ended December 31, 2021, 2020, and 2019 was $1.65, $2.38 and $1.94, respectively. The total intrinsic value of options exercised during the years ended December 31, 2021, 2020, and 2019, was $0.1million, nil, and $0.2 million, respectively. The total fair value of options vested during the years ended December 31, 2021, 2020 and 2019 was $0.3 million, $1.0 million and $1.6 million, respectively. ​ 253,335 options were exercised during the year ended December 31, 2021, at a weighted average exercise price of $1.31 per share. For these exercises, 237,719 shares of the Company’s common stock were issued. For the remaining 15,616 options, no common shares were issued because the same number of common shares were surrendered due to exercise by attestation ​ The following table summarizes information about stock options outstanding at December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Outstanding ​ Exercisable Range of Exercise Prices ​ Number of Options ​ Weighted Average Remaining Contractual Term (in years) ​ Weighted Average Exercise Price (per share) ​ Number of Options ​ Weighted Average Exercise Price (per share) $0.00 - $6.25 ​ 2,154,700 ​ 5.12 ​ $ 3.04 ​ 1,548,033 ​ $ 2.96 $6.25 -$12.50 ​ - ​ - ​ $ - ​ - ​ $ - $12.50 - $18.75 ​ 300,000 ​ 0.64 ​ $ 15.92 ​ 300,000 ​ $ 15.92 ​ ​ 2,454,700 ​ 4.58 ​ $ 4.62 ​ 1,848,033 ​ $ 5.06 ​ The assumptions used to determine the value of stock-based awards under the Black-Scholes method are summarized below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ Risk-free interest rate ​ 0.55 % ​ 0.23 % ​ 2.20 % Dividend yield ​ 0.26 % ​ 0.97 % ​ 0.53 % Expected volatility ​ 64.71 % ​ 66.03 % ​ 62.76 % Expected life in years ​ 6 ​ ​ 6 ​ ​ 5 ​ ​ Restricted and Deferred Stock Units ​ A summary of RSU and DSU activity under the Incentive Plan for the years ended December 31, 2021 and 2020 is presented below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Shares ​ Aggregate Intrinsic Value (thousands) ​ Weighted Average Remaining Contractual Term (in years) Nonvested as of December 31, 2019 ​ 401,235 ​ $ 2,223 ​ 8.00 Granted ​ 203,181 ​ ​ ​ ​ - Vested ​ (238,062) ​ ​ ​ ​ - Expired ​ - ​ ​ ​ ​ - Forfeited ​ (16,489) ​ ​ ​ ​ - Nonvested as of December 31, 2020 ​ 349,865 ​ $ 1,017 ​ 4.87 Granted ​ 134,574 ​ ​ ​ ​ - Vested ​ (207,222) ​ ​ ​ ​ - Expired ​ - ​ ​ ​ ​ - Forfeited ​ (171,418) ​ ​ ​ ​ - Nonvested as of December 31, 2021 ​ 105,799 ​ $ 165 ​ 2.69 ​ 2,614 RSUs and 131,960 DSUs were granted during the year ended December 31, 2021. The weighted-average fair value per share of RSUs granted during the years ended December 31, 2021, 2020, and 2019 was, $2.56, $3.78 and $4.83, respectively. The weighted-average fair value per share of DSUs granted during the years ended December 31, 2021 was $1.63. The total intrinsic value of RSUs vested during the years ended December 31, 2021, 2020, and 2019 was $0.1 million, $0.8 million, and $0.4 million, respectively. No DSUs were converted to common shares.

Zinc Zero Cost Collar

Zinc Zero Cost Collar	12 Months Ended
	Dec. 31, 2021
Zinc Zero Cost Collar
Zinc Zero Cost Collar	17. Zinc Zero Cost Collar ​ During the years ended December 31, 2021, 2020 and 2019, the realized and unrealized losses related to the Company’s Zinc Zero Cost Collar are the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in thousands) Unrealized loss on zinc zero cost collar (1) ​ ​ 1,844 ​ ​ - ​ ​ - Realized loss on zinc zero cost collar (1) ​ ​ 1,156 ​ ​ - ​ ​ - Total ​ $ 3,000 ​ $ - ​ $ - ​ (1) Gains and losses due to changes in fair value are non-cash in nature until such time that they are realized through cash transactions. ​ Effective May 18, 2021, GRC entered into Trading Agreement with Auramet International LLC that govern nonexchange traded, over-the-counter, spot, forward and option transactions on both a deliverable and non-deliverable basis involving various metals and currencies. In 2021, the Company had a realized loss of $1.2 million and an unrealized loss of $1.8 million related to the program. Please see Note 14

Other (Income) Expense, Net

Other (Income) Expense, Net	12 Months Ended
	Dec. 31, 2021
Other (Income) Expense, Net
Other (Income) Expense, Net	18. Other (Income) Expense, Net ​ During the years ended December 31, 2021, 2020 and 2019, other expense, net consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in thousands) Unrealized currency exchange (gain) loss (1) ​ $ 493 ​ $ 105 ​ $ (19) Realized currency exchange loss (gain) ​ ​ (111) ​ ​ (17) ​ ​ 252 Realized and unrealized loss (gain) from gold and silver rounds, net (1) ​ ​ 55 ​ ​ (1,173) ​ ​ (671) Loss on disposal of fixed assets ​ ​ 26 ​ ​ 3 ​ ​ 12 (Decrease) increase in reserve for inventory ​ ​ - ​ ​ (148) ​ ​ 885 Employee benefit obligation ​ ​ 947 ​ ​ - ​ ​ - Other (income) expense ​ ​ (390) ​ ​ 42 ​ ​ 5 Total ​ $ 1,020 ​ $ (1,188) ​ $ 464 ​ (1) Gains and losses due to changes in fair value are non-cash in nature until such time that they are realized through cash transactions.

Net Income per Common Share

Net Income per Common Share	12 Months Ended
	Dec. 31, 2021
Net Income per Common Share
Net Income per Common Share	19. Net Income per Common Share ​ Basic income per common share is calculated based on the weighted average number of shares of common stock outstanding for the period. Diluted income per common share is calculated based on the assumption that stock options outstanding, which have an exercise price less than the average market price of the Company’s common stock during the period, would have been exercised on the later of the beginning of the period or the date granted and that the funds obtained from the exercise were used to purchase common shares at the average market price during the period. All the Company’s restricted stock units are considered to be dilutive. ​ The effect of the Company’s dilutive securities is calculated using the treasury stock method and only those instruments that result in a reduction in net income per common share are included in the calculation. Options to purchase 2.2 million, 4.2 million, and 3.6 million shares of common stock at weighted average exercise prices of $10.69, $8.95, and $10.44 were outstanding as of December 31, 2021, 2020, and 2019, respectively, but were not included in the computation of diluted weighted average common shares outstanding, as the exercise price of the options exceeded the average price of the Company’s common stock during those periods, and therefore were anti-dilutive. ​ Basic and diluted net income per common share is calculated as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended ​ December 31, ​ 2021 ​ 2020 2019 Numerator: ​ ​ ​ ​ ​ ​ ​ Net income (loss) from continuing operations ​ 8,028 ​ ​ (6,331) ​ 5,532 Net income from discontinued operations ​ - ​ ​ 10,690 ​ 300 Net income (in thousands) $ 8,028 ​ $ 4,359 $ 5,832 ​ ​ ​ ​ ​ ​ ​ ​ Denominator: ​ ​ ​ ​ ​ ​ ​ Basic weighted average shares of common stock outstanding ​ 75,301,253 ​ ​ 69,902,708 ​ 63,681,156 Dilutive effect of share-based awards ​ 307,374 ​ ​ 783,535 ​ 351,834 Diluted weighted average common shares outstanding ​ 75,608,627 ​ ​ 70,686,243 ​ 64,032,990 ​ ​ ​ ​ ​ ​ ​ ​ Basic and diluted net income (loss) per common share: ​ ​ ​ ​ ​ ​ ​ Continuing operations ​ 0.11 ​ ​ (0.09) ​ 0.09 Discontinued operations ​ - ​ ​ 0.15 ​ - Basic and diluted net income per common share $ 0.11 ​ $ 0.06 $ 0.09 ​

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2021
Fair Value Measurement
Fair Value Measurement	20. Fair Value Measurement ​ Fair value accounting establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below: ​ Level 1 Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; ​ Level 2 Quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability; and ​ Level 3 Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (supported by little or no market activity.) ​ As required by accounting guidance, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The following tables set forth certain of the Company’s assets and liabilities measured at fair value by level within the fair value hierarchy as of December 31, 2021 and 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ ​ ​ December 31, ​ December 31, ​ Input Hierarchy Level ​ ​ 2021 ​ 2020 ​ ​ ​ ​ (in thousands) ​ ​ Cash and cash equivalents ​ $ 33,712 ​ $ 25,405 ​ Level 1 Gold and silver rounds ​ $ 589 ​ $ 671 ​ Level 1 Accounts receivable, net ​ $ 8,672 ​ $ 4,226 ​ Level 2 Derivative liability - zinc zero cost collar ​ $ (1,844) ​ $ - ​ Level 2 ​ The following methods and assumptions were used to estimate the fair value of each class of financial instrument: ​ Cash and cash equivalents & Gold and silver rounds ​ Accounts receivable, net Note 14 ​ Derivative liability - zinc zero cost collar: ​ Gains and losses related to changes in the fair value of these financial instruments were included in the Company’s Consolidated Statements of Operations as shown in the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ Statements of Operations Classification ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ Note ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized and unrealized derivative gain (loss), net 16 ​ $ 1,002 ​ $ (47) ​ $ 1,714 ​ Sales, net Realized and unrealized gold and silver rounds (loss) gain 18 ​ $ (55) ​ $ 1,173 ​ $ 663 ​ Other expense, net Realized loss on zinc zero cost collar 18 ​ $ (1,156) ​ $ - ​ $ - ​ Realized and unrealized loss on zinc zero cost collar Unrealized loss on zinc zero cost collar 18 ​ $ (1,844) ​ $ - ​ $ - ​ Realized and unrealized loss on zinc zero cost collar ​ Realized/Unrealized Derivatives, net ​ The following tables summarize the Company’s realized/unrealized derivatives, net (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ Silver ​ Copper ​ Lead ​ Zinc ​ Total For the year ended December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized (loss) gain ​ $ (47) ​ $ (44) ​ $ 73 ​ $ 163 ​ $ 632 ​ $ 777 Unrealized (loss) gain ​ ​ - ​ ​ (159) ​ ​ 6 ​ ​ (2) ​ ​ 380 ​ ​ 225 Total realized/unrealized derivatives, net ​ $ (47) ​ $ (203) ​ $ 79 ​ $ 161 ​ $ 1,012 ​ $ 1,002 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ Silver ​ Copper ​ Lead ​ Zinc ​ Total For the year ended December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized gain (loss) ​ $ 623 ​ $ 344 ​ $ 35 ​ $ (143) ​ $ (722) ​ $ 137 Unrealized (loss) gain ​ ​ (237) ​ ​ (244) ​ ​ (15) ​ ​ 59 ​ ​ 253 ​ ​ (184) Total realized/unrealized derivatives, net ​ $ 386 ​ $ 100 ​ $ 20 ​ $ (84) ​ $ (469) ​ $ (47) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ Silver ​ Copper ​ Lead ​ Zinc ​ Total For the year ended December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized gain (loss) ​ $ 318 ​ $ 167 ​ $ 17 ​ $ (44) ​ $ 965 ​ $ 1,423 Unrealized gain (loss) ​ ​ 117 ​ ​ 208 ​ ​ 114 ​ ​ (64) ​ ​ (84) ​ ​ 291 Total realized/unrealized derivatives, net ​ $ 435 ​ $ 375 ​ $ 131 ​ $ (108) ​ $ 881 ​ $ 1,714 ​ For the zinc zero cost collar, when the prior month LME average zinc price is greater than the call price, positions settling in the period are recorded as a realized gain or loss, and unsettled positions are recorded as an unrealized gain or loss.

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2021
Discontinued Operations
Discontinued Operations	21. Discontinued Operations As described in Note 1, on December 31, 2020, the Company completed its spin-off of its wholly-owned subsidiary Fortitude Gold Corporation and its subsidiaries (“FGC” or “Nevada Mining Unit”). FGC is presented as discontinued operations in the Company’s consolidated financial statements. Results of discontinued operations for the years ended December 31, 2021, 2020, and 2019 are as follows ( in thousands ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ Sales, net ​ $ - ​ $ 53,967 ​ $ 15,065 Mine cost of sales ​ ​ - ​ ​ 37,784 ​ ​ 14,582 Mine gross profit ​ ​ - ​ ​ 16,183 ​ ​ 483 Exploration expenses ​ ​ - ​ ​ 2,649 ​ ​ 932 Other expense, net ​ ​ - ​ ​ 838 ​ ​ 168 Profit (loss) before income taxes ​ ​ - ​ ​ 12,696 ​ ​ (617) Income tax expense (benefit) ​ ​ - ​ ​ 2,006 ​ ​ (917) Net income from discontinued operations ​ $ - ​ $ 10,690 ​ $ 300 ​ Selected Statements of Cash Flows presenting depreciation and amortization, capital expenditures, sale proceeds and significant operating noncash items of FGC were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from discontinued operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ ​ $ - ​ $ 10,690 ​ $ 300 Adjustments to reconcile net income to net cash from discontinued operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferred income benefit ​ ​ ​ - ​ ​ (224) ​ ​ (917) Depreciation and amortization ​ ​ ​ - ​ ​ 10,377 ​ ​ 4,022 Other operating adjustments ​ ​ ​ - ​ ​ 48 ​ ​ 17 Changes in operating assets and liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Accounts receivable ​ ​ ​ - ​ ​ (145) ​ ​ - Inventories ​ ​ ​ - ​ ​ (2,300) ​ ​ (6,490) Prepaid expenses and other current assets ​ ​ ​ - ​ ​ (1,670) ​ ​ 346 Other non-current assets ​ ​ ​ - ​ ​ (2,085) ​ ​ (3,600) Accounts payable and other accrued liabilities ​ ​ ​ - ​ ​ (1,707) ​ ​ 3,617 Mining royalty and income taxes payable, net ​ ​ ​ - ​ ​ 1,200 ​ ​ - Net cash provided by (used in) discontinued operating activities ​ ​ ​ - ​ ​ 14,184 ​ ​ (2,705) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from discontinued investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Capital expenditures ​ ​ ​ - ​ ​ (6,488) ​ ​ (22,538) Net cash used in discontinued investing activities ​ ​ ​ - ​ ​ (6,488) ​ ​ (22,538) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from discontinued financing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other financing activities ​ ​ - ​ (452) ​ (2,019) Net cash provided used in discontinued financing activities ​ ​ ​ - ​ ​ (452) ​ ​ (2,019) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Supplemental Cash Flow Information Discontinued Operations ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-cash investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Change in capital expenditures in accounts payable ​ ​ $ - ​ $ (1,544) ​ $ (1,174) Change in estimate for asset retirement costs ​ ​ $ - ​ $ 1,159 ​ $ 1,726 ​ Effective December 31, 2020, in connection with the spin-off, the Company entered into an agreement with FGC that governs the relationship of the parties following the spin-off. The Management Services Agreement provided that the Company and its subsidiaries provide services to FGC to assist in the transition of FGC as a separate company. The agreed upon charges for services rendered were based on market rates that align with the rates that an unaffiliated service provider would charge for similar services. Due to the successful development of FGC’s corporate, administrative, and technical capabilities, the Company terminated the Agreement effective on May 21, 2021.

Supplementary Cash Flow Informa

Supplementary Cash Flow Information	12 Months Ended
	Dec. 31, 2021
Supplementary Cash Flow Information
Supplementary Cash Flow Information	22. Supplementary Cash Flow Information ​ During the years ended December 31, 2021, 2020, and 2019, other operating adjustments and write-downs within the net cash provided by operations on the Consolidated Statements of Cash Flows consisted of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in thousands) ​ ​ ​ Unrealized loss (gain) on gold and silver rounds ​ $ 53 ​ $ (170) ​ $ (671) Realized loss (gain) on gold and silver rounds ​ ​ 2 ​ ​ (1,003) ​ ​ - Unrealized foreign currency exchange loss (gain) ​ ​ 493 ​ ​ 105 ​ ​ (19) Loss on disposition of fixed assets ​ ​ 37 ​ ​ 3 ​ ​ 12 Increase (decrease) in reserve for inventory ​ ​ 175 ​ ​ (148) ​ ​ 885 Stock-based compensation related to restructuring ​ ​ - ​ ​ 809 ​ ​ - Unrealized loss on zinc zero cost collar ​ ​ 1,844 ​ ​ - ​ ​ - Other ​ ​ 105 ​ ​ - ​ ​ 98 Total other operating adjustments ​ $ 2,709 ​ $ (404) ​ $ 305 ​

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2021
Segment Reporting
Segment Reporting	23. Segment Reporting ​ As of December 31, 2021, the Company has organized its operations into three geographic regions. The geographic regions include Oaxaca, Mexico, Michigan, U.S.A. and Corporate and Other. Oaxaca, Mexico represents the Company’s only production stage property. Michigan, U.S.A. is an advanced exploration stage property. Intercompany revenue and expense amounts have been eliminated within each segment in order to report on the basis that management uses internally for evaluating segment performance. The Company’s business activities that are not considered production stage or advanced exploration stage properties are included in Corporate and Other. ​ The following table shows selected information from the Consolidated Balance Sheets relating to the Company’s segments (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Oaxaca, Mexico ​ Michigan, USA (1) ​ Corporate and Other ​ Consolidated As of December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total current assets ​ $ 50,057 ​ $ 5,528 ​ $ 3,330 ​ $ 58,915 Total non-current assets ​ ​ 66,756 ​ ​ 90,018 ​ ​ 73 ​ ​ 156,847 Total assets ​ $ 116,813 ​ $ 95,546 ​ $ 3,404 ​ $ 215,762 Total current liabilities ​ ​ 25,833 ​ ​ 2,459 ​ ​ 1,367 ​ ​ 29,659 Total non-current liabilities ​ ​ 1,436 ​ ​ 63,438 ​ ​ 479 ​ ​ 65,353 Total shareholders' equity ​ ​ 89,544 ​ ​ 29,649 ​ ​ 1,557 ​ ​ 120,750 Total liabilities and shareholders' equity ​ $ 116,813 ​ $ 95,546 ​ $ 3,403 ​ $ 215,762 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total current assets ​ $ 34,744 ​ $ - ​ $ 8,129 ​ $ 42,873 Total non-current assets ​ ​ 62,695 ​ ​ - ​ ​ 166 ​ ​ 62,861 Total assets ​ $ 97,439 ​ $ - ​ $ 8,295 ​ $ 105,734 Total current liabilities ​ ​ 11,007 ​ ​ - ​ ​ 1,078 ​ ​ 12,085 Total non-current liabilities ​ ​ 3,098 ​ ​ - ​ ​ 13 ​ ​ 3,111 Total shareholders' equity ​ ​ 83,334 ​ ​ - ​ ​ 7,204 ​ ​ 90,538 Total liabilities and shareholders' equity ​ $ 97,439 ​ $ - ​ $ 8,295 ​ $ 105,734 ​ (1) Michigan, USA was acquired on December 10, 2021 and therefore there are no December 31, 2020 balances. The following table shows selected information from the Consolidated Statements of Operations relating to the Company’s segments (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Oaxaca, Mexico ​ Michigan, USA (1) ​ Corporate and Other ​ Consolidated For the year ended December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sales, net ​ $ 125,196 ​ $ - ​ $ - ​ $ 125,196 Total mine cost of sales ​ ​ 88,449 ​ ​ - ​ ​ - ​ ​ 88,449 Exploration expense ​ ​ 4,813 ​ ​ 55 ​ ​ 18 ​ ​ 4,886 Total other costs and expenses (without exploration) ​ ​ 3,995 ​ ​ 1,167 ​ ​ 9,056 ​ ​ 14,218 Provision for income taxes (benefit) ​ ​ 8,518 ​ ​ 305 ​ ​ 792 ​ ​ 9,615 Net income (loss) from continuing operations ​ $ 19,421 ​ $ (1,527) ​ $ (9,866) ​ $ 8,028 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sales, net ​ $ 90,692 ​ $ - ​ $ - ​ $ 90,692 Total mine cost of sales ​ ​ 78,205 ​ ​ - ​ ​ - ​ ​ 78,205 Exploration expense ​ ​ 2,418 ​ ​ - ​ ​ 67 ​ ​ 2,485 Total other costs and expenses (without exploration) ​ ​ 48 ​ ​ - ​ ​ 10,712 ​ ​ 10,760 Provision for income taxes (benefit) ​ ​ 2,331 ​ ​ - ​ ​ 3,242 ​ ​ 5,573 Net income (loss) from continuing operations ​ $ 7,690 ​ $ - ​ $ (14,021) ​ $ (6,331) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sales, net ​ $ 120,301 ​ $ - ​ $ - ​ $ 120,301 Total mine cost of sales ​ ​ 91,669 ​ ​ - ​ ​ - ​ ​ 91,669 Exploration expense ​ ​ 2,614 ​ ​ - ​ ​ 106 ​ ​ 2,720 Total other costs and expenses (without exploration) ​ ​ 1,101 ​ ​ - ​ ​ 9,312 ​ ​ 10,413 Provision for income taxes (benefit) ​ ​ 7,612 ​ ​ - ​ ​ 2,355 ​ ​ 9,967 Net income (loss) from continuing operations ​ $ 17,305 ​ $ - ​ $ (11,773) ​ $ 5,532 ​ (1) Michigan, USA was acquired on December 10, 2021 and therefore there is no information for the years ended December 31, 2020 and 2019.

COVID-19 Pandemic

COVID-19 Pandemic	12 Months Ended
	Dec. 31, 2021
COVID-19 Pandemic
COVID-19 Pandemic	24. COVID-19 ​ The Company continues to protect the health and safety of our employees, contractors, and communities, by taking precautionary measures, including specialized training, social distancing, screening workers before they enter facilities, a work from home mandate where possible, and close monitoring of national and regional COVID-19 impacts and governmental guidelines. Since our non-mining workforce is able to work remotely with the benefit of technology, we are able to maintain our operations and internal controls over financial reporting and disclosures. ​ On August 18, 2021, we announced the temporary suspension of activities at the Don David Gold Mine in response to a spike in COVID-19 cases at our mine and surrounding communities. The suspension lasted twelve days and by September 7, 2021, we had significantly ramped back up operations under further enhanced COVID-19 protocols. The Company incurred COVID-19 specific costs of $0.2 million in 2021 for activities such as additional health and safety procedures, increased transportation, and community contributions. We are working with local authorities, to improve the availability of vaccines to our employees and host communities. As of the date of the issuance of these Consolidated Financial Statements, there have been no other significant impacts, including impairments, to the Company’s operations and financial statements. However, the long-term impact of the COVID-19 outbreak on the Company’s results of operations, financial position, and cash flows will depend on future developments, including the duration and spread of the outbreak and related advisories and restrictions. These developments and the impact of COVID-19 on the financial markets and the overall economy are highly uncertain and cannot be predicted. If the financial markets and/or the overall economy are impacted for an extended period, the Company’s results of operations, financial position, and cash flows may be materially adversely affected. The Company is not able to estimate the duration of the pandemic and potential impact on its business if disruptions or delays in business developments and shipments of product occur. In addition, a severe prolonged economic downturn could result in a variety of risks to the business, including a decreased ability to raise additional capital when and if needed on acceptable terms, if at all. As the situation continues to evolve, the Company will continue to closely monitor market conditions and respond accordingly. The Company has completed various scenario planning analyses to consider potential impacts of COVID-19 on its business, including volatility in commodity prices, temporary disruptions and/or curtailments of operating activities (voluntary or involuntary). The Company believes that current working capital balances will be sufficient for the foreseeable future, although there is no assurance that will be the case .

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2021
Subsequent Events
Subsequent Events	25. Subsequent Events ​ None. ​

Nature of Operations and Summ_2

Nature of Operations and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Nature of Operations and Summary of Significant Accounting Policies
Nature of Operations	Nature of Operations ​ Gold Resource Corporation (the “Company”) was organized under the laws of the State of Colorado on August 24, 1998. The Company is a producer of doré containing gold and silver and metal concentrates that contain gold, silver, copper, lead, and zinc in Oaxaca, Mexico.
Acquisition	Acquisition ​ On December 10, 2021, the Company completed the acquisition of all the issued and outstanding common shares of Aquila Resources Inc. Aquila’s principal asset is its 100% interest in the Back Forty Project located in Menominee County, Michigan, USA. The Back Forty Project has a polymetallic (gold, silver, copper, silver, lead, and zinc) Volcanogenic Massive Sulfide deposit. The Back Forty Project controls surface and mineral rights through ownership, leases with the State of Michigan, and royalties with private parties. The Company considered the appropriate accounting treatment with regards to the Financial Accounting Standards Board’s Accounting Standards Codification (“ASC”) 805 Business Combinations and determined it was appropriate to account for this transaction as an asset acquisition. Please see Note 2 ​ Asset Acquisition ​ The Company considered the appropriate accounting treatment with regards to the Financial Accounting Standards Board’s ASC 805 Business Combinations for all material merger and acquisition transactions as they occur. The facts and circumstances of each transaction are evaluated to determine the appropriate accounting. Please see Note 2
Spin-Off	Spin-Off ​ On December 31, 2020, The Company completed the spin-off of its wholly-owned subsidiary, Fortitude Gold Corporation and its subsidiaries (“FGC” or “Nevada Mining Unit”), into a separate, public company Note 21 ​ The spin-off was affected by the distribution of all of the outstanding shares of FGC common stock to the Company’s shareholders (the “Distribution”). The Company’s shareholders of record as of the close of business on December 28, 2020 (the “Record Date”) received one share of FGC common stock for every 3.5
Basis of Presentation	Basis of Presentation ​ The consolidated financial statements included herein are expressed in United States dollars and conform to U.S. GAAP. The consolidated financial statements include the accounts of the Company, its Mexican subsidiary, Don David Gold Mexico S.A. de C.V., and its newly acquired Aquila subsidiaries (See Exhibit 21.1 for material subsidiaries). Intercompany accounts and transactions have been eliminated in consolidation.
Discontinued Operations	Discontinued Operations ​ The Company presents discontinued operations when there is a disposal of a component group or a group of components that in its judgment represents a strategic shift that will have a major effect on its operations and financial results. The Company aggregates the results of operations for discontinued operations into a single line item in the Consolidated Statements of Operations for all periods presented. General corporate overhead is not allocated to discontinued operations. See Note 20
Segment Reporting	Segment Reporting ​ The Company has organized its operations into three geographic regions. The geographic regions include Oaxaca, Mexico, Michigan, U.S.A. and Corporate and Other. Oaxaca, Mexico represents the Company’s only production stage property. Michigan, U.S.A. is an advanced exploration stage property. The Company’s business activities that are not considered production stage or advanced exploration stage properties are included in Corporate and Other .
Use of Estimates	Use of Estimates ​ The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. The more significant areas requiring the use of management estimates and assumptions relate to Mineral Resources and Mineral Reserves that are the basis for future cash flow estimates utilized in impairment calculations and units-of-production depreciation calculations; asset and liability valuation related to acquisitions; accounting for asset acquisitions; future metal prices, especially as it relates to zinc zero cost collar; environmental remediation, reclamation and closure obligations; estimates of recoverable gold and other minerals in stockpiles; write-downs of inventory, stockpiles to net realizable value; valuation allowances for deferred tax assets and liabilities; valuation of contingent considerations and gold and silver stream agreements, provisional amounts related to income tax effects of newly enacted tax laws; and stock-based compensation. Management routinely makes judgments and estimates about the effects of matters that are inherently uncertain and bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under the circumstances. Actual results could differ from these estimates.
Reclassifications	Reclassifications ​ Certain amounts presented in prior periods have been reclassified to conform to the current period presentation. Starting 2020, the Company showed Stock-based compensation as a separate line item in the Consolidated Statements of Operations. In 2019, Stock-based compensation was included with General and administrative expenses. The reclassifications had no material effect on the Company’s results of operations or financial condition.
Cash and Cash Equivalents	Cash and Cash Equivalents ​ Cash and cash equivalents consist of all cash balances and are highly liquid. Cash held in Mexican Pesos or Canadian Dollars is converted to U.S. Dollars at the closing exchange rate on December 31, 2021. ​
Gold and Silver Rounds	Gold and Silver Rounds ​ The Company sponsored a physical dividend program which was concluded in 2021. Historically, the Company purchased gold and silver rounds on the open market in order to diversify its treasury and provide an option for shareholders to convert their dividends into rounds. At December 31, 2021, the Company held gold and silver rounds carried at quoted market value prices based on the daily London P.M. fix as of the balance sheet date. The Company considers rounds a highly liquid investment.
Accounts Receivable, net	Accounts Receivable, net ​ Accounts receivable consists of trade receivables, which are recorded net of allowance for doubtful accounts, from the sale of doré and metals concentrates, as well an embedded derivative based on mark-to-market adjustments for outstanding provisional invoices based on forward metal prices. Please see Note 14 Note 19
Inventories	Inventories ​ The major inventory categories are set forth below: ​ Stockpile Inventories : ​ Concentrate Inventories ​ Doré Inventory: ​ Materials and Supplies Inventories ​ Write-downs of inventory are charged to production costs on the Consolidated Statements of Operations.
Promissory Note	Promissory Note ​ The promissory note was acquired in the Aquila Transaction. In October 2021, Aquila sold its Wisconsin assets to Green Light Metals in return for a C$4.9 million ($3.9 million) promissory note. Under the promissory note, Green Light Metals is to pay C$0.9 million cash and deliver C$4.0 million in Green Light Metal shares once Green Light Metals goes public. The cash and shares will be delivered upon completion of Green Light Metals listing on the TSX and the shares are expected to represent approximately 18% of the total outstanding shares of Green Light Metals. Upon maturity on December 31, 2022, the shares of Green Light Metals will be recorded at fair value as available-for-sale securities. Due to the short maturity of the promissory note, the carrying amount approximates the fair value, and likewise, no interest and collateral is required.
Property, Plant and Mine Development	Property, Plant and Mine Development ​ Land and Mineral Interests : ​ Mine Development : ​ Drilling costs incurred during the production phase for operational ore control are recorded as mine development and amortized using UOP. All other drilling and related costs are expensed as incurred. ​ Mine development costs are amortized using the UOP method based on estimated recoverable ounces in Mineral Reserves. ​ Property and Equipment ​ Construction in Progress ​ Depreciation and Amortization ​ ​ ​ ​ ​ ​ Range of Lives ​ Asset retirement costs ​ UOP ​ Furniture, computer and office equipment ​ 3 to 10 years ​ Light vehicles and other mobile equipment ​ 4 years ​ Machinery and equipment ​ UOP to 4 years ​ Mill facilities and related infrastructure ​ UOP ​ Mine development and mineral interests ​ UOP ​
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets ​ The Company evaluates its long-lived assets for impairment when events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Asset impairment is considered to exist if the total estimated future cash flows on an undiscounted basis are less than the carrying amount of the asset. If an impairment is indicated, a determination is made whether an impairment has occurred. Impairment losses are measured either 1) as the excess of carrying value over the total discounted estimated future cash flows, or 2) by applying an expected fair value technique in the absence of an observable market price; losses are charged to expense on the Company’s Consolidated Statements of Operations. In estimating future cash flows, assets are grouped at the lowest level for which there are identifiable cash flows that are largely independent of future cash flows from other asset groups. ​ Existing Mineral Resources and Mineral Reserves are included when estimating the fair value in determining whether the assets are impaired. The Company’s estimates of future cash flows are based on numerous assumptions including expected gold and other commodity prices, production levels, capital requirements and estimated salvage values. It is possible that actual future cash flows will be significantly different from the estimates, as actual future quantities of recoverable minerals, gold and other commodity prices, production levels and costs, and capital requirements are each subject to significant risks and uncertainties.
Fair Value of Financial Instruments	Fair Value of Financial Instruments ​ The recorded amounts of cash and cash equivalents, gold and silver rounds, receivables from provisional concentrate sales and accounts payable approximate fair value because of the short maturity of those instruments. The recorded amounts for the zinc zero cost collar are based on the London Metal Exchange forward underlying price over a period from the trade date to the payment date. ​
Treasury Stock	Treasury Stock ​ Treasury stock represents shares of the Company’s common stock which have been repurchased on the open market at the prevailing market price at the time of purchase and have not been cancelled. Treasury stock is shown at cost as a separate component of equity.
Revenue Recognition	Revenue Recognition ​ The Company recognizes revenue from doré and concentrate sales. ​ Doré sales ​ Concentrate sales
Production Costs	Production Costs ​ Production costs include labor and benefits, royalties, concentrate and doré shipping costs, mining costs, fuel and lubricants, legal and professional fees related to mine operations, stock-based compensation attributable to mine workers, materials and supplies, repairs and maintenance, explosives, site support, housing and food, insurance, reagents, travel, medical services, security equipment, office rent, tools and other costs that support mining operations.
Exploration Costs	Exploration Costs ​ Exploration costs are charged to expense as incurred. Costs to identify new Mineral Resources and to evaluate potential Mineral Resources are considered exploration costs. Exploration activities conducted within the defined Mineral Resources are capitalized.
Stock-Based Compensation	Stock-Based Compensation ​ The Company accounts for stock-based compensation under the fair value recognition and measurement provisions of U.S. GAAP. Those provisions require all stock-based payments, including grants of stock options, RSUs, and DSUs to be measured based on the grant date fair value of the awards, with the resulting expense generally recognized on a straight-line basis in the Consolidated Statements of Operations over the period during which services are performed in exchange for the award. The majority of the awards are earned over a service period of three years. DSUs are earned immediately at grant and expected to be paid out in cash in the future. DSUs are considered liability instruments and marked-to-market each reporting period. The Company's estimates may be impacted by certain variables including, but not limited to, stock price volatility, employee stock option exercise behaviors, additional stock option grants, and estimates of forfeitures.
Reclamation and Remediation Costs	Reclamation and Remediation Costs ​ Reclamation costs are allocated to expense over the life of the related assets and are periodically adjusted to reflect changes in the estimated present value resulting from the passage of time and revisions to the estimates of either the timing or amount of the reclamation and remediation costs. Reclamation obligations are based in part on when the spending for an existing environmental disturbance will occur. The Company reviews, at least on an annual basis, the reclamation obligation. ​ Prior to 2014, the Company had been recognizing only reclamation and remediation obligations and all associated asset retirement costs were written off as the Company had not been reporting its proven and probable Mineral Reserves for its Don David Gold Mine. In 2014, the Company became a production stage company and therefore capitalized asset retirement costs along with the asset retirement obligation. Please see Note 11 ​ Accounting for reclamation and remediation obligations requires management to make estimates unique to each mining operation of the future costs expected to be incurred to complete the reclamation and remediation work required to comply with existing laws and regulations. Actual costs incurred in future periods could differ from amounts estimated. Additionally, future changes to environmental laws and regulations could increase the extent of reclamation and remediation work required. Any such increases in future costs could materially impact the amounts charged to operations for reclamation and remediation.
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss ​ Accumulated other comprehensive loss is presented in the consolidated statements of changes in shareholders’ equity. Accumulated other comprehensive loss is composed of foreign currency translation adjustment effects related to the historical adjustment when the functional currency was the Mexican peso for our Mexico subsidiary. This loss will remain on our Consolidated Balance Sheets until the sale or dissolution of our Mexico subsidiary.
Income and Mining Royalty Taxes	Income and Mining Royalty Taxes ​ Income and Mining Royalty Taxes are computed using the asset and liability method. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial and tax reporting purposes and the effect of net operating loss and foreign tax credit carryforwards using enacted tax rates in effect in the years in which the differences are expected to reverse. Deferred tax assets are evaluated to determine if it is more likely than not that they will be realized. Please see Note 6
Net Income Per Share	Net Income Per Share ​ Basic earnings per share is calculated based on the weighted average number of common shares outstanding for the period. Diluted income per share reflects the dilution that could occur if potentially dilutive securities, as determined using the treasury stock method, are converted into common stock. Potentially dilutive securities are excluded from the calculation when their inclusion would be anti-dilutive, such as periods when a net loss is reported or when the exercise price of the instrument exceeds the average fair market value of the underlying common stock.
Foreign Currency	Foreign Currency ​ The functional currency for all of the Company’s subsidiaries is the United States dollar (“U.S. dollar”).
Concentration of Credit Risk	Concentration of Credit Risk ​ The Company has considered and assessed the credit risk resulting from its concentrate sales and doré sales arrangements with its customers. In the event that the Company’s relationships with its customers are interrupted for any reason, the Company believes that it would be able to locate another entity to purchase its metals concentrates and doré bars; however, any interruption could temporarily disrupt the Company’s sale of its products and materially adversely affect operating results. ​ The Company’s Arista and Alta Gracia mines, which are located in the State of Oaxaca, Mexico, accounted for 100%of the Company’s total net sales from continuing operations for the years ended December 31, 2021, 2020 and 2019, respectively. ​ Some of the Company’s operating cash balances are maintained in accounts that currently exceed federally insured limits. The Company believes that the financial strength of the depositing institutions mitigates the underlying risk of loss. To date, these concentrations of credit risk have not had a significant impact on the Company’s financial position or results of operations.

Nature of Operations and Summ_3

Nature of Operations and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Nature of Operations and Summary of Significant Accounting Policies
Estimated Economic Lives	​ ​ ​ ​ ​ ​ Range of Lives ​ Asset retirement costs ​ UOP ​ Furniture, computer and office equipment ​ 3 to 10 years ​ Light vehicles and other mobile equipment ​ 4 years ​ Machinery and equipment ​ UOP to 4 years ​ Mill facilities and related infrastructure ​ UOP ​ Mine development and mineral interests ​ UOP ​

Aquila Acquisition (Tables)

Aquila Acquisition (Tables)	1 Months Ended
	Oct. 31, 2021
Aquila Acquisition
Schedule of Preliminary Allocation of Purchase Price	​ ​ ​ ​ AQUILA ACQUISITION ​ As of December 10, 2021 Consideration: ​ ​ Cash Consideration, including transaction costs $ 4,571 Stock Consideration (13,714,630 shares at $1.79 per share) ​ 24,549 Total Consideration: $ 29,120 ​ ​ ​ Value of net assets acquired: ​ ​ Assets: ​ ​ Cash and cash equivalents $ 2,208 Accounts receivable ​ 142 Promissory Note ​ 3,885 Prepaid expenses ​ 29 Security deposits ​ 27 Property, plant and mine development ​ 89,579 Total Assets ​ 95,870 Liabilities: ​ ​ Accounts payable and accrued liabilities ​ 3,314 Leases payable - current ​ 127 Exploration reclamation liability ​ 611 Gold and silver stream agreements ​ 42,421 Contingent consideration ​ 4,603 Leases payable - long term ​ 205 Deferred tax liability ​ 15,469 Total Liabilities ​ 66,750 Total net assets: $ 29,120

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue
Revenue from the sale of dore and concentrate	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in thousands) ​ Doré sales, net ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ $ 8,120 ​ $ 8,719 ​ $ 6,763 Silver ​ ​ 678 ​ ​ 2,774 ​ ​ 2,439 Less: Refining charges ​ ​ (136) ​ ​ (233) ​ ​ (171) Total doré sales, net ​ ​ 8,662 ​ ​ 11,260 ​ ​ 9,031 Concentrate sales ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ ​ 32,593 ​ ​ 22,145 ​ ​ 27,184 Silver ​ ​ 26,095 ​ ​ 20,391 ​ ​ 21,347 Copper ​ ​ 13,495 ​ ​ 9,387 ​ ​ 9,930 Lead ​ ​ 13,442 ​ ​ 12,012 ​ ​ 16,116 Zinc ​ ​ 41,256 ​ ​ 36,451 ​ ​ 48,804 Less: Treatment and refining charges ​ ​ (11,349) ​ ​ (20,907) ​ ​ (13,825) Total concentrate sales, net ​ ​ 115,532 ​ ​ 79,479 ​ ​ 109,556 Realized gain embedded derivative, net ​ ​ 777 ​ ​ 138 ​ ​ 1,423 Unrealized gain (loss) - embedded derivative, net ​ ​ 225 ​ ​ (185) ​ ​ 291 Total sales, net ​ $ 125,196 ​ $ 90,692 ​ $ 120,301

Gold and Silver Rounds (Tables)

Gold and Silver Rounds (Tables)	12 Months Ended
	Dec. 31, 2021
Gold and Silver Rounds
Schedule of Company's Holdings	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2021 ​ As of December 31, 2020 ​ ​ Ounces ​ Per Ounce ​ Amount ​ Ounces ​ Per Ounce ​ Amount ​ ​ ​ ​ ​ ​ ​ (in thousands) ​ ​ ​ ​ ​ ​ (in thousands) Gold ​ 176 ​ $ 1,820 ​ $ 320 ​ 189 ​ $ 1,888 ​ $ 357 Silver ​ 11,655 ​ $ 23.09 ​ ​ 269 ​ 11,842 ​ $ 26.49 ​ ​ 314 Total holdings ​ ​ ​ ​ ​ ​ $ 589 ​ ​ ​ ​ ​ ​ $ 671

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2021
Inventories
Summary of Inventories	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Stockpiles - underground mine ​ $ - ​ $ 648 Stockpiles - open pit mine ​ ​ - ​ ​ 41 Concentrates ​ ​ 2,048 ​ ​ 1,919 Doré, net (1) ​ ​ 452 ​ ​ 459 Subtotal - product inventories ​ ​ 2,500 ​ ​ 3,067 Materials and supplies (2) ​ ​ 7,861 ​ ​ 6,928 Total ​ $ 10,361 ​ $ 9,995 ​ (1) Net of reserve of nil and $368 as of December 31, 2021 and 2020, respectively. (2) Net of reserve for obsolescence of $384 and $209 as of December 31, 2021 and 2020, respectively.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Taxes
Components of net income before income taxes and extraordinary item	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years Ended December 31, ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ (in thousands) ​ U.S. Operations ​ $ (6,369) ​ $ (7,196) ​ $ (6,338) ​ Foreign Operations ​ ​ 24,012 ​ ​ 6,438 ​ ​ 21,837 ​ Total income before income taxes ​ $ 17,643 ​ $ (758) ​ $ 15,499 ​ ​
Calculation of Income Taxes Provision	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Years ended December 31, ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ (in thousands) ​ Current taxes: ​ ​ ​ U.S. Federal ​ $ - ​ $ - ​ $ - ​ U.S. State ​ ​ 305 ​ ​ - ​ ​ - ​ Foreign ​ ​ 11,426 ​ ​ 3,294 ​ ​ 6,210 ​ Total current taxes ​ $ 11,731 ​ $ 3,294 ​ $ 6,210 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferred taxes: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Federal ​ $ - ​ $ 2,999 ​ $ 1,881 ​ U.S. State ​ ​ - ​ ​ - ​ ​ - ​ Foreign ​ ​ (2,116) ​ ​ (720) ​ ​ 1,876 ​ Total deferred taxes ​ $ (2,116) ​ $ 2,279 ​ $ 3,757 ​ Total income tax provision ​ $ 9,615 ​ $ 5,573 ​ $ 9,967 ​
Differences between provision for income taxes and income tax determined	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ (in thousands) ​ Tax at statutory rates ​ $ 3,705 ​ $ (159) ​ $ 3,255 ​ Foreign rate differential ​ ​ 2,095 ​ ​ 558 ​ ​ 1,969 ​ GILTI Inclusion ​ ​ - ​ ​ (886) ​ ​ 2,173 ​ Changes in deferred tax assets ​ ​ (1,189) ​ ​ 3,919 ​ ​ 277 ​ Mexico mining tax ​ ​ 1,590 ​ ​ 280 ​ ​ 1,126 ​ Foreign exchange ​ ​ 535 ​ ​ 866 ​ ​ 255 ​ Stock option expiration ​ ​ 2,471 ​ ​ 449 ​ ​ 361 ​ Mexico withholding tax ​ ​ 679 ​ ​ 192 ​ ​ 374 ​ Deduction for inflation in Mexico ​ ​ (981) ​ ​ (550) ​ ​ (338) ​ U.S. State income tax ​ ​ 585 ​ ​ 127 ​ ​ 139 ​ Other ​ ​ 125 ​ ​ 777 ​ ​ 376 ​ Tax provision ​ $ 9,615 ​ $ 5,573 ​ $ 9,967 ​
Tax Effects of Temporary Differences That Give Rise to Significant Portions of Deferred Tax Assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, ​ ​ ​ 2021 ​ 2020 ​ ​ ​ (in thousands) ​ Non-current deferred tax assets: ​ ​ ​ ​ ​ ​ ​ Tax loss carryforward ​ $ 29,496 ​ $ 2,190 ​ Property and equipment ​ ​ 12,092 ​ ​ 10,355 ​ Share-based compensation ​ ​ 1,068 ​ ​ 4,018 ​ Foreign tax credits ​ ​ 4,089 ​ ​ 4,089 ​ Inventory ​ ​ 142 ​ ​ 79 ​ Foreign mining tax ​ ​ 793 ​ ​ 199 ​ Accounts payable ​ ​ 2,708 ​ ​ 912 ​ Employee profit sharing obligation ​ ​ 566 ​ ​ - ​ Zinc derivatives ​ ​ 608 ​ ​ - ​ Other ​ ​ 362 ​ ​ 377 ​ Total deferred tax assets ​ ​ 51,924 ​ ​ 22,219 ​ Valuation allowance ​ ​ (36,933) ​ ​ (10,592) ​ Deferred tax assets after valuation allowance ​ $ 14,991 ​ $ 11,627 ​ Deferred tax liability – Property, plant and mine development ​ ​ (28,117) ​ ​ (11,318) ​ Net deferred tax (liability) asset ​ $ (13,126) ​ $ 309 ​

Prepaid Expenses and Other Cu_2

Prepaid Expenses and Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Prepaid Expenses And Other Current Assets
Schedule of prepaid and other assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Advances to suppliers ​ $ 188 ​ $ 374 Prepaid insurance ​ ​ 1,222 ​ ​ 709 IVA taxes receivable, net ​ ​ 20 ​ ​ 846 Other current assets ​ ​ 266 ​ ​ 647 Total ​ $ 1,696 ​ $ 2,576

Property, Plant and Mine Deve_2

Property, Plant and Mine Development, net (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Mine Development, net
Schedule of property, plant and mine development	​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Asset retirement costs ​ $ 1,065 ​ $ 1,064 Construction-in-progress (1) ​ ​ 15,854 ​ ​ 7,158 Furniture and office equipment ​ ​ 1,685 ​ ​ 1,839 Land ​ ​ 9,230 ​ ​ 230 Mineral interest ​ ​ 79,964 ​ ​ - Light vehicles and other mobile equipment ​ ​ 2,224 ​ ​ 2,192 Machinery and equipment ​ ​ 33,213 ​ ​ 31,227 Mill facilities and infrastructure ​ ​ 24,973 ​ ​ 24,407 Mine Development ​ ​ 92,138 ​ ​ 83,859 Software and licenses ​ ​ 1,592 ​ ​ 1,619 Subtotal (2) ​ ​ 261,938 ​ ​ 153,595 Accumulated depreciation and amortization ​ ​ (105,167) ​ ​ (91,084) Total ​ $ 156,771 ​ $ 62,511 ​ (1) Primarily related to the dry stack filtration plant. (2) Includes capital expenditures in accounts payable and accruals of $1.7 million and $1.0 at December 31, 2021 and 2020, respectively.

Accrued Expenses and Other Li_2

Accrued Expenses and Other Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
Accrued Expenses and Other Liabilities
Schedule of Accrued Expenses and Other Current Liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Accrued royalty payments ​ ​ 1,743 ​ ​ 1,796 Dividends payable ​ ​ - ​ ​ 247 Zinc derivatives ​ ​ 1,844 ​ ​ - Employee profit sharing obligation ​ ​ 1,888 ​ ​ - Other payables ​ ​ 1,100 ​ ​ 232 Total accrued expenses and other current liabilities ​ $ 6,575 ​ $ 2,275 ​ ​ ​ ​ ​ ​ ​ Accrued non-current labor obligation ​ ​ 920 ​ ​ - Deferred stock unit compensation liability ​ ​ 206 ​ ​ - Other long-term liabilities ​ ​ 826 ​ ​ 13 Total other non-current liabilities ​ $ 1,952 ​ $ 13

Gold and Silver Stream Agreem_2

Gold and Silver Stream Agreements (Tables)	12 Months Ended
	Dec. 31, 2021
Gold and Silver Stream Agreements
Schedule of liabilities related to the deferred revenues	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ December 31, ​ December 31, ​ ​ 2021 ​ 2019 ​ ​ (in thousands) Liability related to the Gold Stream Agreement ​ $ 20,364 ​ $ - Liability related to the Silver Stream Agreement ​ ​ 22,196 ​ ​ - Total liability ​ $ 42,560 ​ $ -

Reclamation and Remediation (Ta

Reclamation and Remediation (Tables)	12 Months Ended
	Dec. 31, 2021
Reclamation and Remediation
Changes in Reclamation and Remediation	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ ​ (in thousands) Reclamation liabilities – balance at beginning of period ​ $ 1,890 ​ $ 2,003 Foreign currency exchange gain ​ ​ (57) ​ ​ (113) Reclamation liabilities – balance at end of period ​ ​ 1,833 ​ ​ 1,890 ​ ​ ​ ​ ​ ​ ​ Asset retirement obligation – balance at beginning of period ​ ​ 1,208 ​ ​ 1,105 Changes in estimate ​ ​ - ​ ​ 82 Accretion ​ ​ 109 ​ ​ 79 Foreign currency exchange gain ​ ​ (38) ​ ​ (58) Asset retirement obligation – balance at end of period ​ ​ 1,279 ​ ​ 1,208 Total period end balance ​ $ 3,112 ​ $ 3,098

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2021
Derivatives
Summary of unsettled sales contracts	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ Silver ​ Copper ​ Lead ​ Zinc ​ ​ Total ​ ​ (ounces) ​ (ounces) ​ (tonnes) ​ (tonnes) ​ (tonnes) ​ ​ ​ Under contract ​ ​ 3,014 ​ ​ 215,786 ​ ​ 275 ​ ​ 1,503 ​ ​ 4,180 ​ ​ ​ Average forward price (per ounce or tonne) ​ $ 1,803 ​ $ 23.18 ​ $ 9,598 ​ $ 2,311 ​ $ 3,356 ​ ​ ​ Unsettled sales contracts value (in thousands) ​ $ 5,434 ​ $ 5,002 ​ $ 2,639 ​ $ 3,473 ​ $ 14,028 ​ $ 30,576

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2021
Stock-Based Compensation
Schedule of Share-based Compensation, Stock Options, Activity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Shares ​ Weighted Average Exercise Price (per share) ​ Weighted Average Remaining Contractual Term (in years) ​ Aggregate Intrinsic Value (thousands) Outstanding as of December 31, 2019 ​ 4,564,735 ​ $ 8.54 ​ 5.09 ​ $ 4,513 Granted ​ 100,000 ​ ​ 3.45 ​ - ​ ​ ​ Exercised ​ - ​ ​ - ​ - ​ ​ ​ Expired ​ (486,666) ​ ​ 13.82 ​ - ​ ​ ​ Forfeited ​ (4,901) ​ ​ 6.57 ​ - ​ ​ ​ Outstanding as of December 31, 2020 ​ 4,173,168 ​ $ 6.83 ​ 3.58 ​ $ 1,324 Granted ​ 600,000 ​ ​ 3.22 ​ - ​ ​ ​ Exercised ​ (253,335) ​ ​ 1.31 ​ - ​ ​ ​ Expired ​ (2,035,966) ​ ​ 9.14 ​ - ​ ​ ​ Forfeited ​ (29,167) ​ ​ 5.89 ​ - ​ ​ ​ Outstanding as of December 31, 2021 ​ 2,454,700 ​ $ 4.62 ​ 4.58 ​ $ 109 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Vested and exercisable as of December 31, 2021 ​ 1,848,033 ​ $ 5.06 ​ 3.17 ​ $ 109
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Outstanding ​ Exercisable Range of Exercise Prices ​ Number of Options ​ Weighted Average Remaining Contractual Term (in years) ​ Weighted Average Exercise Price (per share) ​ Number of Options ​ Weighted Average Exercise Price (per share) $0.00 - $6.25 ​ 2,154,700 ​ 5.12 ​ $ 3.04 ​ 1,548,033 ​ $ 2.96 $6.25 -$12.50 ​ - ​ - ​ $ - ​ - ​ $ - $12.50 - $18.75 ​ 300,000 ​ 0.64 ​ $ 15.92 ​ 300,000 ​ $ 15.92 ​ ​ 2,454,700 ​ 4.58 ​ $ 4.62 ​ 1,848,033 ​ $ 5.06
Schedule of Assumptions Used to Determine the Value of our Stock-based Awards	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ Risk-free interest rate ​ 0.55 % ​ 0.23 % ​ 2.20 % Dividend yield ​ 0.26 % ​ 0.97 % ​ 0.53 % Expected volatility ​ 64.71 % ​ 66.03 % ​ 62.76 % Expected life in years ​ 6 ​ ​ 6 ​ ​ 5 ​
Schedule of RSU activity under the Incentive Plan	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Shares ​ Aggregate Intrinsic Value (thousands) ​ Weighted Average Remaining Contractual Term (in years) Nonvested as of December 31, 2019 ​ 401,235 ​ $ 2,223 ​ 8.00 Granted ​ 203,181 ​ ​ ​ ​ - Vested ​ (238,062) ​ ​ ​ ​ - Expired ​ - ​ ​ ​ ​ - Forfeited ​ (16,489) ​ ​ ​ ​ - Nonvested as of December 31, 2020 ​ 349,865 ​ $ 1,017 ​ 4.87 Granted ​ 134,574 ​ ​ ​ ​ - Vested ​ (207,222) ​ ​ ​ ​ - Expired ​ - ​ ​ ​ ​ - Forfeited ​ (171,418) ​ ​ ​ ​ - Nonvested as of December 31, 2021 ​ 105,799 ​ $ 165 ​ 2.69
Stock-based compensation expense	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ 2021 ​ 2020 ​ 2019 ​ (in thousands) Stock options $ 549 ​ $ 1,956 ​ $ 1,458 Restricted stock units ​ 120 ​ ​ 1,083 ​ ​ 474 Deferred stock units ​ 206 ​ ​ - ​ ​ - Total $ 875 ​ $ 3,039 ​ $ 1,932

Zinc Zero Cost Collar (Tables)

Zinc Zero Cost Collar (Tables)	12 Months Ended
	Dec. 31, 2021
Zinc Zero Cost Collar
Schedule of realized and unrealized losses related to Zinc Zero Cost Collar	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in thousands) Unrealized loss on zinc zero cost collar (1) ​ ​ 1,844 ​ ​ - ​ ​ - Realized loss on zinc zero cost collar (1) ​ ​ 1,156 ​ ​ - ​ ​ - Total ​ $ 3,000 ​ $ - ​ $ - ​ (1) Gains and losses due to changes in fair value are non-cash in nature until such time that they are realized through cash transactions.

Other (Income) Expense, Net (Ta

Other (Income) Expense, Net (Tables)	12 Months Ended
	Dec. 31, 2021
Other (Income) Expense, Net
Schedule of Other (Income) Expense, net	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in thousands) Unrealized currency exchange (gain) loss (1) ​ $ 493 ​ $ 105 ​ $ (19) Realized currency exchange loss (gain) ​ ​ (111) ​ ​ (17) ​ ​ 252 Realized and unrealized loss (gain) from gold and silver rounds, net (1) ​ ​ 55 ​ ​ (1,173) ​ ​ (671) Loss on disposal of fixed assets ​ ​ 26 ​ ​ 3 ​ ​ 12 (Decrease) increase in reserve for inventory ​ ​ - ​ ​ (148) ​ ​ 885 Employee benefit obligation ​ ​ 947 ​ ​ - ​ ​ - Other (income) expense ​ ​ (390) ​ ​ 42 ​ ​ 5 Total ​ $ 1,020 ​ $ (1,188) ​ $ 464 ​ (1) Gains and losses due to changes in fair value are non-cash in nature until such time that they are realized through cash transactions.

Net Income per Common Share (Ta

Net Income per Common Share (Tables)	12 Months Ended
	Dec. 31, 2021
Net Income per Common Share
Schedule of net income per common share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended ​ December 31, ​ 2021 ​ 2020 2019 Numerator: ​ ​ ​ ​ ​ ​ ​ Net income (loss) from continuing operations ​ 8,028 ​ ​ (6,331) ​ 5,532 Net income from discontinued operations ​ - ​ ​ 10,690 ​ 300 Net income (in thousands) $ 8,028 ​ $ 4,359 $ 5,832 ​ ​ ​ ​ ​ ​ ​ ​ Denominator: ​ ​ ​ ​ ​ ​ ​ Basic weighted average shares of common stock outstanding ​ 75,301,253 ​ ​ 69,902,708 ​ 63,681,156 Dilutive effect of share-based awards ​ 307,374 ​ ​ 783,535 ​ 351,834 Diluted weighted average common shares outstanding ​ 75,608,627 ​ ​ 70,686,243 ​ 64,032,990 ​ ​ ​ ​ ​ ​ ​ ​ Basic and diluted net income (loss) per common share: ​ ​ ​ ​ ​ ​ ​ Continuing operations ​ 0.11 ​ ​ (0.09) ​ 0.09 Discontinued operations ​ - ​ ​ 0.15 ​ - Basic and diluted net income per common share $ 0.11 ​ $ 0.06 $ 0.09

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Measurement
Assets measured at fair value by level within fair value hierarchy	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of ​ As of ​ ​ ​ ​ December 31, ​ December 31, ​ Input Hierarchy Level ​ ​ 2021 ​ 2020 ​ ​ ​ ​ (in thousands) ​ ​ Cash and cash equivalents ​ $ 33,712 ​ $ 25,405 ​ Level 1 Gold and silver rounds ​ $ 589 ​ $ 671 ​ Level 1 Accounts receivable, net ​ $ 8,672 ​ $ 4,226 ​ Level 2 Derivative liability - zinc zero cost collar ​ $ (1,844) ​ $ - ​ Level 2
Gains and Losses Related to Changes in Fair Value	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ Statements of Operations Classification ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ Note ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized and unrealized derivative gain (loss), net 16 ​ $ 1,002 ​ $ (47) ​ $ 1,714 ​ Sales, net Realized and unrealized gold and silver rounds (loss) gain 18 ​ $ (55) ​ $ 1,173 ​ $ 663 ​ Other expense, net Realized loss on zinc zero cost collar 18 ​ $ (1,156) ​ $ - ​ $ - ​ Realized and unrealized loss on zinc zero cost collar Unrealized loss on zinc zero cost collar 18 ​ $ (1,844) ​ $ - ​ $ - ​ Realized and unrealized loss on zinc zero cost collar
Realized and Unrealized Gain Losses on Derivatives	The following tables summarize the Company’s realized/unrealized derivatives, net (in thousands) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ Silver ​ Copper ​ Lead ​ Zinc ​ Total For the year ended December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized (loss) gain ​ $ (47) ​ $ (44) ​ $ 73 ​ $ 163 ​ $ 632 ​ $ 777 Unrealized (loss) gain ​ ​ - ​ ​ (159) ​ ​ 6 ​ ​ (2) ​ ​ 380 ​ ​ 225 Total realized/unrealized derivatives, net ​ $ (47) ​ $ (203) ​ $ 79 ​ $ 161 ​ $ 1,012 ​ $ 1,002 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ Silver ​ Copper ​ Lead ​ Zinc ​ Total For the year ended December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized gain (loss) ​ $ 623 ​ $ 344 ​ $ 35 ​ $ (143) ​ $ (722) ​ $ 137 Unrealized (loss) gain ​ ​ (237) ​ ​ (244) ​ ​ (15) ​ ​ 59 ​ ​ 253 ​ ​ (184) Total realized/unrealized derivatives, net ​ $ 386 ​ $ 100 ​ $ 20 ​ $ (84) ​ $ (469) ​ $ (47) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gold ​ Silver ​ Copper ​ Lead ​ Zinc ​ Total For the year ended December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Realized gain (loss) ​ $ 318 ​ $ 167 ​ $ 17 ​ $ (44) ​ $ 965 ​ $ 1,423 Unrealized gain (loss) ​ ​ 117 ​ ​ 208 ​ ​ 114 ​ ​ (64) ​ ​ (84) ​ ​ 291 Total realized/unrealized derivatives, net ​ $ 435 ​ $ 375 ​ $ 131 ​ $ (108) ​ $ 881 ​ $ 1,714

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2021
Discontinued Operations
Schedule of discontinued operations in company's condensed consolidated financial statements	Results of discontinued operations for the years ended December 31, 2021, 2020, and 2019 are as follows ( in thousands ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ Sales, net ​ $ - ​ $ 53,967 ​ $ 15,065 Mine cost of sales ​ ​ - ​ ​ 37,784 ​ ​ 14,582 Mine gross profit ​ ​ - ​ ​ 16,183 ​ ​ 483 Exploration expenses ​ ​ - ​ ​ 2,649 ​ ​ 932 Other expense, net ​ ​ - ​ ​ 838 ​ ​ 168 Profit (loss) before income taxes ​ ​ - ​ ​ 12,696 ​ ​ (617) Income tax expense (benefit) ​ ​ - ​ ​ 2,006 ​ ​ (917) Net income from discontinued operations ​ $ - ​ $ 10,690 ​ $ 300 ​ Selected Statements of Cash Flows presenting depreciation and amortization, capital expenditures, sale proceeds and significant operating noncash items of FGC were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from discontinued operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ ​ $ - ​ $ 10,690 ​ $ 300 Adjustments to reconcile net income to net cash from discontinued operating activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deferred income benefit ​ ​ ​ - ​ ​ (224) ​ ​ (917) Depreciation and amortization ​ ​ ​ - ​ ​ 10,377 ​ ​ 4,022 Other operating adjustments ​ ​ ​ - ​ ​ 48 ​ ​ 17 Changes in operating assets and liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Accounts receivable ​ ​ ​ - ​ ​ (145) ​ ​ - Inventories ​ ​ ​ - ​ ​ (2,300) ​ ​ (6,490) Prepaid expenses and other current assets ​ ​ ​ - ​ ​ (1,670) ​ ​ 346 Other non-current assets ​ ​ ​ - ​ ​ (2,085) ​ ​ (3,600) Accounts payable and other accrued liabilities ​ ​ ​ - ​ ​ (1,707) ​ ​ 3,617 Mining royalty and income taxes payable, net ​ ​ ​ - ​ ​ 1,200 ​ ​ - Net cash provided by (used in) discontinued operating activities ​ ​ ​ - ​ ​ 14,184 ​ ​ (2,705) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from discontinued investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Capital expenditures ​ ​ ​ - ​ ​ (6,488) ​ ​ (22,538) Net cash used in discontinued investing activities ​ ​ ​ - ​ ​ (6,488) ​ ​ (22,538) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash flows from discontinued financing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other financing activities ​ ​ - ​ (452) ​ (2,019) Net cash provided used in discontinued financing activities ​ ​ ​ - ​ ​ (452) ​ ​ (2,019) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Supplemental Cash Flow Information Discontinued Operations ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-cash investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Change in capital expenditures in accounts payable ​ ​ $ - ​ $ (1,544) ​ $ (1,174) Change in estimate for asset retirement costs ​ ​ $ - ​ $ 1,159 ​ $ 1,726

Supplementary Cash Flow Infor_2

Supplementary Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2021
Supplementary Cash Flow Information
Schedule of Other Operating Adjustments and Write Downs	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in thousands) ​ ​ ​ Unrealized loss (gain) on gold and silver rounds ​ $ 53 ​ $ (170) ​ $ (671) Realized loss (gain) on gold and silver rounds ​ ​ 2 ​ ​ (1,003) ​ ​ - Unrealized foreign currency exchange loss (gain) ​ ​ 493 ​ ​ 105 ​ ​ (19) Loss on disposition of fixed assets ​ ​ 37 ​ ​ 3 ​ ​ 12 Increase (decrease) in reserve for inventory ​ ​ 175 ​ ​ (148) ​ ​ 885 Stock-based compensation related to restructuring ​ ​ - ​ ​ 809 ​ ​ - Unrealized loss on zinc zero cost collar ​ ​ 1,844 ​ ​ - ​ ​ - Other ​ ​ 105 ​ ​ - ​ ​ 98 Total other operating adjustments ​ $ 2,709 ​ $ (404) ​ $ 305

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting
Schedule of financial information relating to the Company segments	The following table shows selected information from the Consolidated Balance Sheets relating to the Company’s segments (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Oaxaca, Mexico ​ Michigan, USA (1) ​ Corporate and Other ​ Consolidated As of December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total current assets ​ $ 50,057 ​ $ 5,528 ​ $ 3,330 ​ $ 58,915 Total non-current assets ​ ​ 66,756 ​ ​ 90,018 ​ ​ 73 ​ ​ 156,847 Total assets ​ $ 116,813 ​ $ 95,546 ​ $ 3,404 ​ $ 215,762 Total current liabilities ​ ​ 25,833 ​ ​ 2,459 ​ ​ 1,367 ​ ​ 29,659 Total non-current liabilities ​ ​ 1,436 ​ ​ 63,438 ​ ​ 479 ​ ​ 65,353 Total shareholders' equity ​ ​ 89,544 ​ ​ 29,649 ​ ​ 1,557 ​ ​ 120,750 Total liabilities and shareholders' equity ​ $ 116,813 ​ $ 95,546 ​ $ 3,403 ​ $ 215,762 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As of December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total current assets ​ $ 34,744 ​ $ - ​ $ 8,129 ​ $ 42,873 Total non-current assets ​ ​ 62,695 ​ ​ - ​ ​ 166 ​ ​ 62,861 Total assets ​ $ 97,439 ​ $ - ​ $ 8,295 ​ $ 105,734 Total current liabilities ​ ​ 11,007 ​ ​ - ​ ​ 1,078 ​ ​ 12,085 Total non-current liabilities ​ ​ 3,098 ​ ​ - ​ ​ 13 ​ ​ 3,111 Total shareholders' equity ​ ​ 83,334 ​ ​ - ​ ​ 7,204 ​ ​ 90,538 Total liabilities and shareholders' equity ​ $ 97,439 ​ $ - ​ $ 8,295 ​ $ 105,734 ​ (1) Michigan, USA was acquired on December 10, 2021 and therefore there are no December 31, 2020 balances.
Schedule of asset balances, excluding investments and intercompany	The following table shows selected information from the Consolidated Statements of Operations relating to the Company’s segments (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Oaxaca, Mexico ​ Michigan, USA (1) ​ Corporate and Other ​ Consolidated For the year ended December 31, 2021 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sales, net ​ $ 125,196 ​ $ - ​ $ - ​ $ 125,196 Total mine cost of sales ​ ​ 88,449 ​ ​ - ​ ​ - ​ ​ 88,449 Exploration expense ​ ​ 4,813 ​ ​ 55 ​ ​ 18 ​ ​ 4,886 Total other costs and expenses (without exploration) ​ ​ 3,995 ​ ​ 1,167 ​ ​ 9,056 ​ ​ 14,218 Provision for income taxes (benefit) ​ ​ 8,518 ​ ​ 305 ​ ​ 792 ​ ​ 9,615 Net income (loss) from continuing operations ​ $ 19,421 ​ $ (1,527) ​ $ (9,866) ​ $ 8,028 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, 2020 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sales, net ​ $ 90,692 ​ $ - ​ $ - ​ $ 90,692 Total mine cost of sales ​ ​ 78,205 ​ ​ - ​ ​ - ​ ​ 78,205 Exploration expense ​ ​ 2,418 ​ ​ - ​ ​ 67 ​ ​ 2,485 Total other costs and expenses (without exploration) ​ ​ 48 ​ ​ - ​ ​ 10,712 ​ ​ 10,760 Provision for income taxes (benefit) ​ ​ 2,331 ​ ​ - ​ ​ 3,242 ​ ​ 5,573 Net income (loss) from continuing operations ​ $ 7,690 ​ $ - ​ $ (14,021) ​ $ (6,331) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ For the year ended December 31, 2019 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Sales, net ​ $ 120,301 ​ $ - ​ $ - ​ $ 120,301 Total mine cost of sales ​ ​ 91,669 ​ ​ - ​ ​ - ​ ​ 91,669 Exploration expense ​ ​ 2,614 ​ ​ - ​ ​ 106 ​ ​ 2,720 Total other costs and expenses (without exploration) ​ ​ 1,101 ​ ​ - ​ ​ 9,312 ​ ​ 10,413 Provision for income taxes (benefit) ​ ​ 7,612 ​ ​ - ​ ​ 2,355 ​ ​ 9,967 Net income (loss) from continuing operations ​ $ 17,305 ​ $ - ​ $ (11,773) ​ $ 5,532 ​ (1) Michigan, USA was acquired on December 10, 2021 and therefore there is no information for the years ended December 31, 2020 and 2019.

Nature of Operations and Summ_4

Nature of Operations and Summary of Significant Accounting Policies (Details) $ in Thousands, $ in Millions	Dec. 10, 2021USD ($)	Oct. 31, 2021CAD ($)	Dec. 31, 2021USD ($)segment	Dec. 31, 2020USD ($)	Dec. 31, 2019	Oct. 31, 2021USD ($)	Oct. 31, 2021CAD ($)
Nature Of Operations [Line Items]
Stock split conversion ratio			0.2857
Allowance for doubtful accounts			$ 0	$ 0
Number of geographic regions | segment			3
Concentrate sale percentage based on provisional sales price			100.00%
Awards earned over period			3 years
Sales Revenue Net | Sales Revenue [Member]
Nature Of Operations [Line Items]
Concentration risk			100.00%	100.00%	100.00%
Aquila Resources Inc.
Nature Of Operations [Line Items]
Percentage of voting equity interests acquired	100.00%		100.00%
Promissory note - cash payment	$ 4,571
Value of shares issuable as a part of consideration	$ 24,549
Aquila Resources Inc. | Green Light Metals
Nature Of Operations [Line Items]
Promissory notes receivable						$ 3,900	$ 4.9
Promissory note - cash payment		$ 0.9
Value of shares issuable as a part of consideration		$ 4
Percentage of equity interest		18.00%

Nature of Operations and Summ_5

Nature of Operations and Summary of Significant Accounting Policies - Estimated Economic Lives (Details)	12 Months Ended
	Dec. 31, 2021
Furniture, computer and office equipment | Minimum
Property Plant And Equipment [Line Items]
Useful life	3 years
Furniture, computer and office equipment | Maximum
Property Plant And Equipment [Line Items]
Useful life	10 years
Light Vehicles And Other Mobile Equipment
Property Plant And Equipment [Line Items]
Useful life	4 years
Machinery And Equipment | Maximum
Property Plant And Equipment [Line Items]
Useful life	4 years

Aquila Acquisitions (Details)

Aquila Acquisitions (Details) $ / shares in Units, $ in Thousands	Dec. 10, 2021USD ($)$ / sharesshares	Dec. 31, 2021USD ($)shares	Dec. 31, 2020USD ($)shares
Asset Acquisition [Line Items]
Common Stock Shares Outstanding | shares		88,338,774	74,376,958
Assets:
Cash and cash equivalents		$ 33,712	$ 25,405
Accounts receivable, net		8,672	4,226
Promissory Note		3,885
Prepaid expenses		1,696	2,576
Property, plant and mine development, net		156,771	62,511
Total assets		215,762	105,734
Liabilities:
Exploration reclamation liability		3,112	3,098
Gold and silver stream agreements		42,560
Deferred tax liabilities, net		13,126
Total liabilities		$ 95,012	$ 15,196
Aquila Resources Inc.
Asset Acquisition [Line Items]
Exchange ratio of shares received by each holder	0.0399
Common Stock Shares Issued | shares	343,725,063
Common Stock Shares Outstanding | shares	343,725,063
Consideration per share | $ / shares	$ 1.79
Transaction Costs	$ 4,600
Consideration:
Cash Consideration, including transaction costs	4,571
Stock Consideration (13,714,630 shares at $1.79 per share)	$ 24,549
Number of shares issued | shares	13,714,630
Total Consideration:	$ 29,120
Assets:
Cash and cash equivalents	2,208
Accounts receivable, net	142
Promissory Note	3,885
Prepaid expenses	29
Security deposits	27
Property, plant and mine development, net	89,579
Total assets	95,870
Liabilities:
Accounts payable and accrued liabilities	3,314
Leases payable - current	127
Exploration reclamation liability	611
Gold and silver stream agreements	42,421
Contingent consideration	4,603
Leases payable - long term	205
Deferred tax liabilities, net	15,469
Total liabilities	66,750
Total net assets:	$ 29,120

Revenue (Details)

Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Realized gain embedded derivative, net	$ 777	$ 138	$ 1,423
Unrealized gain (loss) - embedded derivative, net	225	(185)	291
Total sales, net	125,196	90,692	120,301
Dore
Disaggregation of Revenue [Line Items]
Less: Treatment and refining charges	(136)	(233)	(171)
Total concentrate sales, net	8,662	11,260	9,031
Gold Dore
Disaggregation of Revenue [Line Items]
Total concentrate sales, net	8,120	8,719	6,763
Silver Dore
Disaggregation of Revenue [Line Items]
Total concentrate sales, net	678	2,774	2,439
Concentrate
Disaggregation of Revenue [Line Items]
Less: Treatment and refining charges	(11,349)	(20,907)	(13,825)
Total concentrate sales, net	115,532	79,479	109,556
Gold Concentrate
Disaggregation of Revenue [Line Items]
Total concentrate sales, net	(32,593)	(22,145)	(27,184)
Silver Concentrate
Disaggregation of Revenue [Line Items]
Total concentrate sales, net	26,095	20,391	21,347
Copper Concentrate
Disaggregation of Revenue [Line Items]
Total concentrate sales, net	13,495	9,387	9,930
Lead Concentrate
Disaggregation of Revenue [Line Items]
Total concentrate sales, net	13,442	12,012	16,116
Zinc Concentrate
Disaggregation of Revenue [Line Items]
Total concentrate sales, net	$ 41,256	$ 36,451	$ 48,804

Gold and Silver Rounds (Details

Gold and Silver Rounds (Details)	12 Months Ended
	Dec. 31, 2021USD ($)oz$ / oz	Dec. 31, 2020USD ($)oz$ / oz
Schedule of Investments [Line Items]
Total carrying value	$ 589,000	$ 671,000
Gold
Schedule of Investments [Line Items]
Ounces sold	1	1,641
Additional ounces	12
Ounces | oz	176	189
Carrying value per ounce | $ / oz	1,820	1,888
Total carrying value	$ 320,000	$ 357,000
Silver
Schedule of Investments [Line Items]
Ounces sold	39	67,560
Additional ounces	148
Ounces | oz	11,655	11,842
Carrying value per ounce | $ / oz	23.09	26.49
Total carrying value	$ 269,000	$ 314,000
Gold And Silver
Schedule of Investments [Line Items]
Other Income	$ 2,000	$ 1,000,000

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Stockpiles - underground mine		$ 648
Stockpiles - open pit mine		41
Concentrates	$ 2,048	1,919
Dore, net	452	459
Subtotal - product inventories	2,500	3,067
Materials and supplies	7,861	6,928
Total	10,361	9,995
Dore
Inventory reserve	0	368
Materials and supplies
Inventory reserve	$ 384	$ 209

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Deferred tax liabilities, assets acquisition	$ 13,100
Withholding tax on dividends	10.00%
Dividend withholding tax between countries	5.00%
Dividend Withholding Tax Amount Between Countries	$ 500	$ 200	$ 400
MITL corporate income tax rate	30.00%
MITL royalty tax on mining concessions	7.50%
Royalty fee as percent of gross revenue	0.50%
Valuation allowance	$ 36,933	10,592
Uncertain tax position	0	$ 0
Federal
Income Taxes [Line Items]
Operating loss carry-forward	80,700
Global Intangible Low Taxed Income [Member]
Income Taxes [Line Items]
Portion of U.S. tax rate		90.00%
Prior year GILTI tax expense		$ 900
Between 2023 And 2026 [Member] | Foreign Tax Authority
Income Taxes [Line Items]
Tax credits carryforwards	4,100
Between 2022 and 2024 [Member] | Federal
Income Taxes [Line Items]
Operating loss carry-forward	400
Between 2027 and 2037 [Member] | Federal
Income Taxes [Line Items]
Operating loss carry-forward	46,800
No Expiration [Member] | Federal
Income Taxes [Line Items]
Operating loss carry-forward	33,900
MICHIGAN | State and Local
Income Taxes [Line Items]
Operating loss carry-forward	51,600
MICHIGAN | Between 2022 and 2027 [Member] | State and Local
Income Taxes [Line Items]
Operating loss carry-forward	27,200
MICHIGAN | No Expiration [Member] | State and Local
Income Taxes [Line Items]
Operating loss carry-forward	24,400
COLORADO | State and Local
Income Taxes [Line Items]
Operating loss carry-forward	40,500
COLORADO | Between 2022 and 2037 [Member] | State and Local
Income Taxes [Line Items]
Operating loss carry-forward	30,800
COLORADO | No Expiration [Member] | State and Local
Income Taxes [Line Items]
Operating loss carry-forward	9,800
CANADA | Between 2026 and 2041 [Member] | Foreign Tax Authority
Income Taxes [Line Items]
Operating loss carry-forward	30,800
Aquila Resources Inc.
Income Taxes [Line Items]
Valuation allowance	$ 27,500

Income Taxes - U.S. And Foreign

Income Taxes - U.S. And Foreign Components Of Loss Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
U.S. Operations	$ (6,369)	$ (7,196)	$ (6,338)
Foreign Operations	24,012	6,438	21,837
Income (loss) before income taxes	$ 17,643	$ (758)	$ 15,499

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
State Current Taxes	$ 305
Foreign Current Taxes	11,426	$ 3,294	$ 6,210
Total current taxes	11,731	3,294	6,210
Federal Deferred Taxes		2,999	1,881
Foreign Deferred Taxes	(2,116)	(720)	1,876
Total deferred taxes	(2,116)	2,279	3,757
Total income tax provision	$ 9,615	$ 5,573	$ 9,967

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Taxes Reported At Company's Tax Rate And U.S. Federal Statutory Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
Tax at statutory rates	$ 3,705	$ (159)	$ 3,255
Foreign rate differential	2,095	558	1,969
GILTI Inclusion		(886)	2,173
Changes in deferred tax assets	(1,189)	3,919	277
Mexico mining tax	1,590	280	1,126
Foreign exchange	535	866	255
Stock option expiration	2,471	449	361
Mexico Withholding Tax	679	192	374
Deduction for Inflation in Mexico	(981)	(550)	(338)
U.S. State income tax	585	127	139
Other	125	777	376
Total income tax provision	$ 9,615	$ 5,573	$ 9,967

Income Taxes - Tax Effects of T

Income Taxes - Tax Effects of Temporary Differences That Give Rise to Significant Portions of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Taxes
Tax loss carryforward	$ 29,496	$ 2,190
Property and equipment	12,092	10,355
Share-based compensation	1,068	4,018
Foreign tax credits	4,089	4,089
Inventory	142	79
Foreign Mining Tax	793	199
Accounts Payable	2,708	912
Employee profit sharing obligation	566
Zinc Derivatives	608
Other	362	377
Total deferred tax assets	51,924	22,219
Valuation allowance	(36,933)	(10,592)
Deferred tax assets after valuation allowance	14,991	11,627
Net deferred tax liability	(13,126)
Deferred tax liability - Property, plant and mine development	$ (28,117)	(11,318)
Net deferred tax (liability) asset		$ 309

Prepaid Expenses and Other Cu_3

Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Prepaid Expenses And Other Current Assets
Advances to suppliers	$ 188	$ 374
Prepaid insurance	1,222	709
IVA taxes receivable, net	20	846
Promissory Note	3,885
Other current assets	266	647
Total	$ 1,696	$ 2,576

Property, Plant and Mine Deve_3

Property, Plant and Mine Development, net - Summary of Property, Equipment and Mine Development (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, equipment and mine development - net
Property and equipment, gross	$ 261,938	$ 153,595
Accumulated depreciation and amortization	(105,167)	(91,084)
Total property, equipment and mine development - net	156,771	62,511
Accrued capital expenditures	1,700	1,000
Asset retirement costs
Property, equipment and mine development - net
Property and equipment, gross	1,065	1,064
Construction-In-Progress
Property, equipment and mine development - net
Property and equipment, gross	15,854	7,158
Furniture and office equipment
Property, equipment and mine development - net
Property and equipment, gross	1,685	1,839
Land And Mineral Rights
Property, equipment and mine development - net
Property and equipment, gross	9,230	230
Mining Properties and Mineral Rights
Property, equipment and mine development - net
Property and equipment, gross	79,964
Light Vehicles And Other Mobile Equipment
Property, equipment and mine development - net
Property and equipment, gross	2,224	2,192
Machinery And Equipment
Property, equipment and mine development - net
Property and equipment, gross	33,213	31,227
Mill facilities and infrastructure
Property, equipment and mine development - net
Property and equipment, gross	24,973	24,407
Mine Development
Property, equipment and mine development - net
Property and equipment, gross	92,138	83,859
Software and licenses
Property, equipment and mine development - net
Property and equipment, gross	$ 1,592	$ 1,619

Property, Plant and Mine Deve_4

Property, Plant and Mine Development, net - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Mine Development, net
Depreciation and amortization expense	$ 15,996	$ 17,413	$ 19,549

Accrued Expenses and Other Li_3

Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Apr. 23, 2021	Dec. 31, 2021	Dec. 31, 2020
Accrued royalty payments		$ 1,743	$ 1,796
Dividends payable			247
Zinc derivatives		1,844
Employee profit sharing obligation		1,888
Other payables		1,100	232
Total accrued expenses and other current liabilities		6,575	2,275
Other Liabilities, Noncurrent [Abstract]
Accrued non-current labor obligation		920
Deferred stock unit ("DSU") compensation liability		206
Other long-term liabilities		826	13
Total other non-current liabilities		1,952	$ 13
Derivative liability		1,800
Percentage of statutory profit sharing payable	10.00%
Other Long-term Liabilities And Other Expenses [member]
Other Liabilities, Noncurrent [Abstract]
Accrued non-current labor obligation		$ 900
Deferred Profit Sharing [Member]
Other Liabilities, Noncurrent [Abstract]
Percentage of statutory profit sharing payable		10.00%
Deferred Profit Sharing [Member] | Current Liabilities And Production Cost [Member]
Employee profit sharing obligation		$ 1,900

Gold and Silver Stream Agreem_3

Gold and Silver Stream Agreements - Liabilities (Details) $ in Thousands	Dec. 31, 2021USD ($)
Deferred revenue	$ 42,560
Gold Streaming Agreement
Deferred revenue	20,364
Silver Streaming Agreement
Deferred revenue	$ 22,196

Gold and Silver Stream Agreem_4

Gold and Silver Stream Agreements - Narrative (Details)	1 Months Ended
	Jun. 30, 2020USD ($)oz	Dec. 31, 2021USD ($)	Nov. 30, 2017USD ($)
Discount rate (as a percent)		8.00%
Deferred revenue		$ 42,560,000
Gold Streaming Agreement
Deferred revenue		20,364,000
Gold Streaming Agreement | Aquila Resources Inc. | Gold [Member]
Amount committed	$ 50,000,000		$ 55,000,000
Cash acquisition costs	20,000,000
Deposit amount	5,000,000
Project Debt Finance First Draw Down	$ 25,000,000
Initial Term of Agreement	40 years
Automatic Renewal Term of Agreement	10 years
Deferred revenue		20,000,000
Contingent Security Deposit Liability		30,000,000
Threshold Stream (as a percent)	18.50%
Production Threshold | oz	105,000
Trail Stream (as a percent)	9.25%
Spot price of gold (as a percent)	30.00%
Maximum Amount Receivable on Gold Per Ounce	$ 600
Gold Streaming Agreement | Aquila Resources Inc. | Silver
Deferred revenue		17,200,000
Threshold price of silver at which deposit received is adjusted	$ 4
Gold Streaming Agreement | Gold Resources Acquisition Company | Aquila Resources Inc. | Gold [Member]
Ownership percentage	100.00%
Silver Streaming Agreement
Deferred revenue		$ 22,196,000
Silver Streaming Agreement | Aquila Resources Inc. | Silver
Cash acquisition costs	$ 17,200,000
Deposit amount	$ 0
Initial Term of Agreement	40 years
Automatic Renewal Term of Agreement	10 years
Commodity produced (as a percent)	85.00%

Reclamation and Remediation (De

Reclamation and Remediation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Asset Retirement Obligation, Roll Forward Analysis
Reclamation liabilities - balance at beginning of period	$ 1,890	$ 2,003
Foreign currency exchange loss (gain)	(57)	(113)
Reclamation liabilities - balance at end of period	1,833	1,890
Asset retirement obligation - balance at beginning of period	1,208	1,105
Changes in estimate		82
Accretion	109	79
Foreign currency exchange loss (gain)	(38)	(58)
Asset retirement obligation - balance at end of period	1,279	1,208
Total period end balance	$ 3,112	$ 3,098

Reclamation and Remediation - N

Reclamation and Remediation - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Undiscounted reclamation liabilities	$ 1,833	$ 1,890	$ 2,003
Asset Retirement Obligation	1,279	1,208	$ 1,105
Exploration reclamation liability	3,112	3,098
Don David Gold Mine
Undiscounted reclamation liabilities	$ 1,800	1,900
Reclamation and remediation discount rate	8.00%
Asset Retirement Obligation	$ 1,300	$ 1,200
Back Forty Project
Exploration reclamation liability	$ 600

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details) $ in Thousands, $ in Millions	Dec. 30, 2013CAD ($)	Dec. 31, 2021USD ($)	Dec. 10, 2021USD ($)	Dec. 31, 2020USD ($)
Leases [Line Items]
Equipment purchase commitments		$ 400		$ 400
Contingent consideration		$ 4,603
Aquila Resources Inc.
Leases [Line Items]
Percentage of voting equity interests acquired		100.00%	100.00%
Contingent consideration			$ 4,603
Aquila Resources Inc. | Gold and silver streaming agreement with Osisko Bermuda Limited | Back Forty Project
Leases [Line Items]
Deposit amount			$ 37,200
Aquila Resources Inc. | HudBay Michigan Inc
Leases [Line Items]
Percentage of voting equity interests acquired	100.00%
Aquila Resources Inc. | Back Forty Project
Leases [Line Items]
Percentage of ownership interest held	100.00%
Contingent consideration	$ 9
Contingent consideration due upon project financing	$ 3
Percentage of contingent consideration payable in shares	50.00%
Contingent consideration payable in shares	$ 3
Right to repurchase ownership interest	51.00%
Contingent consideration		$ 4,600
Aquila Resources Inc. | Back Forty Project | 90 days after the commencement of commercial production
Leases [Line Items]
Contingent consideration payable in cash	$ 2
Aquila Resources Inc. | Back Forty Project | 270 days after the commencement of commercial production
Leases [Line Items]
Contingent consideration payable in cash	2
Aquila Resources Inc. | Back Forty Project | 450 days after the commencement of commercial production
Leases [Line Items]
Contingent consideration payable in cash	$ 2
HudBay Michigan Inc | HudBay Michigan Inc
Leases [Line Items]
Percentage of net smelter return royalty on production	1.00%
HudBay Michigan Inc | Back Forty Project
Leases [Line Items]
Percentage of voting equity interests acquired at the asset acquisition date tied to the development of project	51.00%

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 10, 2021	Apr. 03, 2018
Share issue price ( in dollars per share)			$ 3.88
Shares issued as payment for third-party agreement			25,000
Period for consulting agreement			1 year
Value of shares issued	$ 24,550	$ 25,895	$ 24,546
Dividend per share declared and paid	$ 0.0433
Dividends declared	$ 3,100
Dividends paid	$ 3,400
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value	$ 0.001	$ 0.001
Dividend One
Dividends paid		$ 2,800
Dividend Two
Dividends paid		$ 40
ATM Agreement
Sale of shares	0	8,421,259	6,625,588
Value of shares issued	$ 0	$ 25,800	$ 24,400
Aquila Resources Inc.
Common stock issued for the acquisition of mineral properties (in share)	13,714,630
Share issue price ( in dollars per share)	$ 1.79
Percentage of voting equity interests acquired	100.00%			100.00%
Golden Mile project
Share issue price ( in dollars per share)		$ 3.83
Sale of shares		26,110
Maximum | ATM Agreement
Common stock aggregate gross sales price					$ 75,000

Derivatives (Details)

Derivatives (Details) $ in Thousands	Jan. 04, 2022$ / tt	Dec. 31, 2021USD ($)$ / t$ / oztoz	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Embedded Derivative [Line Items]
Realized (loss) gain		$ 777	$ 137	$ 1,423
Unrealized (loss) gain		225	(184)	291
Unsettled sales contracts value		30,576
Realized loss on embedded derivative		(777)	(138)	(1,423)
Unrealized loss on embedded derivative		(225)	185	(291)
Trading Agreement With Auramet International LLC | Metal And Currencies Derivatives
Embedded Derivative [Line Items]
Realized (loss) gain		1,200
Unrealized (loss) gain			1,800
Gold
Embedded Derivative [Line Items]
Realized (loss) gain		$ (47)	623	318
Unrealized (loss) gain			(237)	117
Under contract | oz		3,014
Average forward price | $ / oz		1,803
Unsettled sales contracts value		$ 5,434
Silver.
Embedded Derivative [Line Items]
Realized (loss) gain		(44)	344	167
Unrealized (loss) gain		$ (159)	(244)	208
Under contract | oz		215,786
Average forward price | $ / oz		23.18
Unsettled sales contracts value		$ 5,002
Copper
Embedded Derivative [Line Items]
Realized (loss) gain		73	35	17
Unrealized (loss) gain		$ 6	(15)	114
Under contract | t		275
Average forward price | $ / t		9,598
Unsettled sales contracts value		$ 2,639
Lead
Embedded Derivative [Line Items]
Realized (loss) gain		163	(143)	(44)
Unrealized (loss) gain		$ (2)	59	(64)
Under contract | t		1,503
Average forward price | $ / t		2,311
Unsettled sales contracts value		$ 3,473
Zinc
Embedded Derivative [Line Items]
Realized (loss) gain		632	(722)	965
Unrealized (loss) gain		$ 380	$ 253	$ (84)
Under contract | t		4,180
Average forward price | $ / t		3,356
Unsettled sales contracts value		$ 14,028
Realized loss on embedded derivative		478
Unrealized loss on embedded derivative		$ 1,800
Call option sold price per tonne | $ / t	3,500	3,066
Call option sold volume | t	3,150
Outstanding derivative position | t		5,700
Derivative, Average Cap Price | $ / t		3,342
Derivative, Floor Price | $ / t	3,200	3,047
Zinc | Maximum
Embedded Derivative [Line Items]
Derivative, Average Cap Price | $ / t		3,408

Employee Benefits (Details)

Employee Benefits (Details)	Apr. 23, 2021	Dec. 31, 2021
Employee Benefits
Defined contribution plan maximum percentage amount of the employee's gross pay that the employee can contribute		50.00%
Percentage Of Statutory Profit Sharing Payable	10.00%

Stock-Based Compensation (Narra

Stock-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021shares	Dec. 31, 2021USD ($)$ / sharesshares	Dec. 31, 2020USD ($)employee$ / sharesshares	Dec. 31, 2019USD ($)$ / shares
Equity Incentive plan shares for issuance authorized | shares		5,000,000
Options granted | shares		600,000	100,000
Weighted-average grant date fair value of options granted | $ / shares		$ 1.65	$ 2.38	$ 1.94
Intrinsic value of shares | $		$ 100	$ 0	$ 200
Weighted Average Exercise Price, Exercised | $ / shares		$ 1.31		$ 1.31
Fair value | $		$ 300	$ 1,000	$ 1,600
Number of stock options exercised | shares		253,335	0
Shares exercised | shares		237,719
Shares not exercised | shares		15,616
Proceeds from the exercise of stock options | $		$ 300		98
Common shares issued | shares		0
Deferred stock units expense | $		$ 200
Deferred stock units liability | $		200
Stock-based compensation | $		875	$ 2,230	$ 1,932
Estimated unrecognized compensation expense | $			700
Accrued Liabilities Current | $		6,575	2,275
STIP
Accrued Liabilities Current | $		$ 700	0
Restricted Stock Units (RSUs)
Vesting period		3 years
Restricted stock units, granted | shares		2,614
Estimated unrecognized compensation expense | $			$ 300
Restricted Stock Units (RSUs) | Spinoff
Number of options that vested | shares			105,568
Restricted stock units, granted | shares			127,068
Number of employees | employee			4
Stock-based compensation | $			$ 800
Deferred Stock Units
Number of units Granted in lieu of board fees | shares		1,960
Vesting period	10 years
Restricted stock units, granted | shares	130,000	131,960

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Activity Under Stock Option Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Beginning Balance (in shares)	4,173,168	4,564,735
Granted (in shares)	600,000	100,000
Stock option exercised (in shares)	(253,335)	0
Expired (in shares)	(2,035,966)	(486,666)
Forfeited (in shares)	(29,167)	(4,901)
Outstanding, Ending Balance (in shares)	2,454,700	4,173,168	4,564,735
Vested and exercisable as of December 31, 2021 (in shares)	1,848,033
Weighted Average Exercise Price
Outstanding Weighted Average Exercise Price, Beginning Balance	$ 6.83	$ 8.54
Weighted Average Exercise Price, Granted	3.22	3.45
Weighted Average Exercise Price, Exercised	1.31		$ 1.31
Weighted Average Exercise Price, Expired	9.14	13.82
Weighted Average Exercise Price, Forfeited	5.89	6.57
Outstanding Weighted Average Exercise Price, Ending Balance	4.62	$ 6.83	$ 8.54
Weighted Average Exercise Price, Vested and exercisable as of end of period	$ 5.06
Weighted -Average Remaining contractual Term (in years)
Weighted Average Remaining Contractual Term (in years), Outstanding as Beginning of period	4 years 6 months 29 days	3 years 6 months 29 days	5 years 1 month 2 days
Weighted Average Remaining Contractual Term (in years), Outstanding as of end of period	4 years 6 months 29 days	3 years 6 months 29 days	5 years 1 month 2 days
Weighted Average Remaining Contractual Term (in years), Vested and exercisable as of end of period	3 years 2 months 1 day
Additional disclosures
Aggregate Intrinsic Value, Outstanding as of beginning of period	$ 1,324	$ 4,513
Aggregate Intrinsic Value, Outstanding as of end of period	109	$ 1,324	$ 4,513
Aggregate Intrinsic Value, Vested and exercisable as of end of period	$ 109

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Stock Options by Exercise Price Range (Details)	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding Number of Options | shares	2,454,700
Outstanding Weighted Average Remaining Contractual Term (in years)	4 years 6 months 29 days
Outstanding Weighted Average Exercise Price (per share)	$ 4.62
Exercisable Number of Options | shares	1,848,033
Exercisable Weighted Average Exercise Price (per share)	$ 5.06
$0.00 - $6.25
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock options exercise price range, lower limit	0
Stock options exercise price range, upper limit	$ 6.25
Outstanding Number of Options | shares	2,154,700
Outstanding Weighted Average Remaining Contractual Term (in years)	5 years 1 month 13 days
Outstanding Weighted Average Exercise Price (per share)	$ 3.04
Exercisable Number of Options | shares	1,548,033
Exercisable Weighted Average Exercise Price (per share)	$ 2.96
$6.25 -$12.50
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock options exercise price range, lower limit	6.25
Stock options exercise price range, upper limit	12.50
$12.50 - $18.75
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock options exercise price range, lower limit	12.50
Stock options exercise price range, upper limit	$ 18.75
Outstanding Number of Options | shares	300,000
Outstanding Weighted Average Remaining Contractual Term (in years)	7 months 20 days
Outstanding Weighted Average Exercise Price (per share)	$ 15.92
Exercisable Number of Options | shares	300,000
Exercisable Weighted Average Exercise Price (per share)	$ 15.92

Stock-Based Compensation - Blac

Stock-Based Compensation - Black-Scholes Assumptions (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-Based Compensation
Risk-free interest rate	0.55%	0.23%	2.20%
Dividend yield	0.26%	0.97%	0.53%
Expected volatility	64.71%	66.03%	62.76%
Expected life in years	6 years	6 years	5 years

Stock-Based Compensation - Su_3

Stock-Based Compensation - Summary of RSU activity under Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted and Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, Beginning Balance (in shares)	349,865	349,865	401,235
Number of units Granted		134,574	203,181
Vested (in shares)		(207,222)	(238,062)
Forfeited (in shares)		(171,418)	(16,489)
Nonvested, Ending Balance		105,799	349,865	401,235
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Total intrinsic value		$ 165	$ 1,017	$ 2,223
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Term (in years)		2 years 8 months 8 days	4 years 10 months 13 days	8 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of units Granted		2,614
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Exercise Price, Granted (per share)		$ 2.56	$ 3.78	$ 4.83
Total intrinsic value		$ 100	$ 800	$ 400
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of units Granted	130,000	131,960
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Exercise Price, Granted (per share)		$ 1.63
Number of shares converted		0

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-based compensation expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-Based Compensation
Stock options	$ 549	$ 1,956	$ 1,458
Restricted stock units	120	1,083	474
Deferred stock units	206
Total	$ 875	$ 3,039	$ 1,932

Zinc Zero Cost Collar (Details)

Zinc Zero Cost Collar (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized loss on zinc zero cost collar	$ 225	$ (184)	$ 291
Realized loss on zinc zero cost collar	777	137	1,423
Total	(3,000)
Zinc
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized loss on zinc zero cost collar	380	253	(84)
Realized loss on zinc zero cost collar	632	$ (722)	$ 965
Zero Cost Collar | Zinc | Not designated as hedge
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized loss on zinc zero cost collar	1,844
Realized loss on zinc zero cost collar	1,156
Total	$ 3,000

Other (Income) Expense, Net (De

Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other (Income) Expense, Net
Unrealized currency exchange (gain) loss	$ 493	$ 105	$ (19)
Realized currency exchange loss (gain)	(111)	(17)	252
Unrealized loss (gain) from gold and silver rounds/bullion, net	55	(1,173)	(671)
Loss on disposal of fixed assets	26	3	12
Increase (decrease) in reserve for inventory	175	(148)	885
Unrealized loss on zinc zero cost collar	1,844
Employee benefit obligation	947
Other (income) expense	(390)	42	5
Total	$ 1,020	$ (1,188)	$ 464

Net Income per Common Share - N

Net Income per Common Share - Narrative (Details) - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Income per Common Share
Stock options excluded from computation of diluted weighted average share outstanding	2.2	4.2	3.6
Shares excluded from weighted average shares outstanding, exercise price	$ 10.69	$ 8.95	$ 10.44

Net Income per Common Share - P

Net Income per Common Share - Potential Dilutive Stock Options On Weighted Average Shares Outstanding (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Income per Common Share
Net income (loss) from continuing operations	$ 8,028	$ (6,331)	$ 5,532
Net income from discontinued operations, net of income taxes		10,690	300
Net income	$ 8,028	$ 4,359	$ 5,832
Basic weighted average shares of common stock outstanding	75,301,253	69,902,708	63,681,156
Dilutive effect of share-based awards	307,374	783,535	351,834
Diluted weighted average common shares outstanding	75,608,627	70,686,243	64,032,990
Basic net income (loss) per common share:
Basic net income (loss) per common share from continuing operations	$ 0.11	$ (0.09)	$ 0.09
Basic net income per common share from discontinued operations		0.15
Basic net income (loss) per common share	0.11	0.06	0.09
Diluted net income (loss) per common share:
Diluted net income (loss) per common share from continuing operations	0.11	(0.09)	0.09
Diluted net income per common share from discontinued operations		0.15
Diluted net income (loss) per common share	$ 0.11	$ 0.06	$ 0.09

Fair Value Measurement (Details

Fair Value Measurement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized/unrealized derivative (loss) gain, net	$ 0	$ 200
Fair Value Inputs Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	33,712	25,405
Gold and silver rounds/bullion	589	671
Fair Value Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accounts receivable, net	8,672	$ 4,226
Derivative liability - zinc zero cost collar	$ (1,844)

Fair Value Measurement - Statem

Fair Value Measurement - Statement Of Income Classification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value Statement Of Income Classification [Line Items]
Unrealized (loss) on zinc zero cost collar, net	$ (1,844)
Sales, net
Fair Value Statement Of Income Classification [Line Items]
Realized/unrealized derivative (loss) gain, net	1,002	$ (47)	$ 1,714
Other expenses, net
Fair Value Statement Of Income Classification [Line Items]
Realized/unrealized gold and silver rounds/bullion gain (loss), net	(55)	$ 1,173	$ 663
Realized (loss) on zinc zero cost collar, net	(1,156)
Unrealized (loss) on zinc zero cost collar, net	$ (1,844)

Fair Value Measurement - Realiz

Fair Value Measurement - Realized Unrealized Derivatives, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Realized (loss) gain	$ 777	$ 137	$ 1,423
Unrealized (loss) gain	225	(184)	291
Total realized/ unrealized derivatives, net	1,002	(47)	1,714
Gold
Derivatives, Fair Value [Line Items]
Realized (loss) gain	(47)	623	318
Unrealized (loss) gain		(237)	117
Total realized/ unrealized derivatives, net	(47)	386	435
Silver.
Derivatives, Fair Value [Line Items]
Realized (loss) gain	(44)	344	167
Unrealized (loss) gain	(159)	(244)	208
Total realized/ unrealized derivatives, net	(203)	100	375
Copper
Derivatives, Fair Value [Line Items]
Realized (loss) gain	73	35	17
Unrealized (loss) gain	6	(15)	114
Total realized/ unrealized derivatives, net	79	20	131
Lead
Derivatives, Fair Value [Line Items]
Realized (loss) gain	163	(143)	(44)
Unrealized (loss) gain	(2)	59	(64)
Total realized/ unrealized derivatives, net	161	(84)	(108)
Zinc
Derivatives, Fair Value [Line Items]
Realized (loss) gain	632	(722)	965
Unrealized (loss) gain	380	253	(84)
Total realized/ unrealized derivatives, net	$ 1,012	$ (469)	$ 881

Discontinued Operations - Resul

Discontinued Operations - Results of discontinued operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income from discontinued operations, net of income taxes	$ 10,690	$ 300
Fortitude Gold Corporation and Subsidiaries | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales, net	53,967	15,065
Mine cost of sales	(37,784)	(14,582)
Mine gross profit	16,183	483
Exploration expenses	(2,649)	(932)
Other expense, net	(838)	(168)
Profit (loss) before income taxes	12,696	(617)
Income tax expense (benefit)	2,006	(917)
Net income from discontinued operations, net of income taxes	$ 10,690	$ 300

Discontinued Operations - Selec

Discontinued Operations - Selected Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash flows from discontinued operating activities:
Net income from discontinued operations, net of income taxes	$ 10,690	$ 300
Changes in operating assets and liabilities:
Net cash provided by discontinued operating activities	14,184	(2,705)
Cash flows from discontinued investing activities:
Net cash used in discontinued investing activities	(6,488)	(22,538)
Cash flows from discontinued financing activities:
Cash transferred from Gold Resource Corporation at Spin-Off	(27,774)
Fortitude Gold Corporation and Subsidiaries | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Spinoff
Cash flows from discontinued operating activities:
Net income from discontinued operations, net of income taxes	10,690	300
Adjustments to reconcile net income to net cash from discontinued operating activities:
Deferred income benefit	(224)	(917)
Depreciation and amortization	10,377	4,022
Other operating adjustments	48	17
Changes in operating assets and liabilities:
Accounts receivable	(145)
Inventories	(2,300)	(6,490)
Prepaid expenses and other current assets	(1,670)	346
Other non-current assets	(2,085)	(3,600)
Accounts payable and other accrued liabilities	(1,707)	3,617
Mining royalty and income taxes payable, net	1,200
Net cash provided by discontinued operating activities	14,184	(2,705)
Cash flows from discontinued investing activities:
Capital expenditures	(6,488)	(22,538)
Net cash used in discontinued investing activities	(6,488)	(22,538)
Cash flows from discontinued financing activities:
Repayment of finance leases	(452)	(2,019)
Net cash provided (to) by discontinued financing activities	(452)	(2,019)
Non-cash investing activities:
Change in capital expenditures in accounts payable	(1,544)	(1,174)
Change in estimate for asset retirement costs	$ 1,159	$ 1,726

Supplementary Cash Flow Infor_3

Supplementary Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplementary Cash Flow Information
Unrealized loss (gain) on gold and silver rounds/bullion	$ 53	$ (170)	$ (671)
Realized loss (gain) on gold and silver rounds/bullion	2	(1,003)
Unrealized foreign currency exchange (gain) loss	493	105	(19)
Loss on disposition of fixed assets	37	3	12
Increase (decrease) in reserve for inventory	175	(148)	885
Stock based compensation related to restructuring		809
Unrealized loss on zinc zero cost collar	1,844
Other	105		98
Total other operating adjustments	$ 2,709	$ (404)	$ 305

Segment Reporting (Details)

Segment Reporting (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)segment	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Number of geographic regions | segment	3
Balance sheet information
Total current assets	$ 58,915	$ 42,873
Total non-current assets	156,847	62,861
Total assets	215,762	105,734
Total current liabilities	29,659	12,085
Total non-current liabilities	65,353	3,111
Total shareholders' equity	120,750	90,538	$ 158,058	$ 127,262
Total liabilities and shareholders' equity	215,762	105,734
Income statement information
Sales, net	125,196	90,692	120,301
Total mine cost of sales	88,449	78,205	91,669
Exploration expenses	4,886	2,485	2,720
Total other costs and expenses (without exploration)	14,218	10,760	10,413
Provision for income taxes	9,615	5,573	9,967
Net income (loss) from continuing operations	8,028	(6,331)	5,532
Operating Segments | Oaxaca, Mexico
Balance sheet information
Total current assets	50,057	34,744
Total non-current assets	66,756	62,695
Total assets	116,813	97,439
Total current liabilities	25,833	11,007
Total non-current liabilities	1,436	3,098
Total shareholders' equity	89,544	83,334
Total liabilities and shareholders' equity	116,813	97,439
Income statement information
Sales, net	125,196	90,692	120,301
Total mine cost of sales	88,449	78,205	91,669
Exploration expenses	4,813	2,418	2,614
Total other costs and expenses (without exploration)	3,995	48	1,101
Provision for income taxes	8,518	2,331	7,612
Net income (loss) from continuing operations	19,421	7,690	17,305
Operating Segments | Michigan, USA
Balance sheet information
Total current assets	5,528
Total non-current assets	90,018
Total assets	95,546
Total current liabilities	2,459
Total non-current liabilities	63,438
Total shareholders' equity	29,649
Total liabilities and shareholders' equity	95,546
Income statement information
Exploration expenses	55
Total other costs and expenses (without exploration)	1,167
Provision for income taxes	305
Net income (loss) from continuing operations	(1,527)
Corporate and Other
Balance sheet information
Total current assets	3,330	8,129
Total non-current assets	73	166
Total assets	3,404	8,295
Total current liabilities	1,367	1,078
Total non-current liabilities	479	13
Total shareholders' equity	1,557	7,204
Total liabilities and shareholders' equity	3,403	8,295
Income statement information
Exploration expenses	18	67	106
Total other costs and expenses (without exploration)	9,056	10,712	9,312
Provision for income taxes	792	3,242	2,355
Net income (loss) from continuing operations	$ (9,866)	$ (14,021)	$ (11,773)

COVID-19 Pandemic (Details)

COVID-19 Pandemic (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
COVID-19 Pandemic
COVID-19 specific costs	$ 0.2