Consolidated Balance Sheets - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 15,878	$ 27,987
Certificates of deposit	252,954	252,298
Accounts receivable, net	461,291	362,579
Inventories	712,696	914,709
Other current assets	0	4,697
Total current assets	1,442,819	1,562,270
Properties, plants and equipment, net	14,854,626	15,132,897
Restricted cash for reclamation bonds	63,345	63,345
IVA receivable and other assets	384,677	372,742
Total assets	16,745,467	17,131,254
Current liabilities:
Checks issued and payable	110,578	28,248
Accounts payable	2,367,656	2,276,357
Due to factor	5,440	10,880
Accrued payroll, taxes and interest	211,703	185,283
Other accrued liabilities	205,412	168,578
Payables to related parties	22,678	22,668
Deferred revenue	32,400	60,049
Notes payable to bank	191,009	192,565
Income taxes payable (Note 11)	430,358	443,110
Long-term debt, current portion, net of discount	632,655	546,988
Total current liabilities	4,209,889	3,934,726
Long-term debt, net of discount and current portion	1,084,827	1,239,126
Hillgrove advances payable	1,134,221	1,134,221
Common stock payable to directors for services	87,500	175,000
Asset retirement obligations and accrued reclamation costs	274,646	271,572
Total liabilities	6,791,083	6,754,645
Commitments and contingencies (Note 7)
Stockholders' equity:
Preferred stock $0.01 par value, 10,000,000 shares authorized: Series A: -0- shares issued and outstanding	0	0
Series B: 750,000 shares issued and outstanding (liquidation preference $909,375 and $907,500 respectively)	7,500	7,500
Series C: 177,904 shares issued and outstanding (liquidation preference $97,847 both years)	1,779	1,779
Series D: 1,751,005 shares issued and outstanding (liquidation preference $5,014,692 and $4,920,178 respectively)	17,509	17,509
Common stock, $0.01 par value, 90,000,000 shares authorized; 68,227,171 and 67,488,063 shares issued and outstanding, respectively	682,271	674,881
Additional paid-in capital	36,406,874	36,239,264
Accumulated deficit	(27,161,549)	(26,564,324)
Total stockholders' equity	9,954,384	10,376,609
Total liabilities and stockholders' equity	$ 16,745,467	$ 17,131,254