Consolidated Balance Sheets - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 23,042,330	$ 665,102
Certificates of deposit	254,873	254,212
Accounts receivable	537,567	238,634
Inventories	717,750	650,213
Other current assets	52,200	0
Total current assets	24,604,720	1,808,161
Properties, plants and equipment, net	11,026,428	11,225,594
Restricted cash for reclamation bonds	57,275	57,275
IVA receivable and other assets	206,818	208,472
Total assets	35,895,241	13,299,502
Current liabilities:
Checks issued and payable	0	86,685
Accounts payable	1,294,514	1,876,874
Accrued liabilities	554,628	635,626
Payables to related party	6,294	227,432
Notes payable to bank	0	100,000
Export tax assessment payable	0	1,120,730
Hillgrove advances payable (Note 12)	1,134,221	378,074
Long-term debt, current portion	40,770	52,122
Total current liabilities	3,030,427	4,477,543
Long-term debt, net of current portion	33,138	34,304
Hillgrove advances payable (Note 12)	0	756,147
CARES Act note payable	443,400	443,400
Stock payable to directors for services	138,125	110,000
Asset retirement obligations and accrued reclamation costs	293,451	291,719
Total liabilities	3,938,541	6,113,113
Commitments and contingencies (Note 6 and 11)
Stockholders' equity:
Common stock, $0.01 par value, 150,000,000 shares authorized; 105,963,567 and 75,949,757 shares issued and outstanding, respectively	1,059,634	759,496
Additional paid-in capital	63,856,560	39,050,899
Accumulated deficit	(32,986,282)	(32,650,794)
Total stockholders' equity	31,956,700	7,186,389
Total liabilities and stockholders' equity	35,895,241	13,299,502
Series A
Stockholders' equity:
Preferred stock $0.01 par value, 10,000,000 shares authorized	0	0
Series B
Stockholders' equity:
Preferred stock $0.01 par value, 10,000,000 shares authorized	7,500	7,500
Series C
Stockholders' equity:
Preferred stock $0.01 par value, 10,000,000 shares authorized	1,779	1,779
Series D
Stockholders' equity:
Preferred stock $0.01 par value, 10,000,000 shares authorized	$ 17,509	$ 17,509