Note 7 - Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Potential Per Share Dividend Amounts Quarterly Price Levels [Table Text Block]

Quarterly Average Realized Silver Price ($ per ounce)		Quarterly Silver- Linked Dividend (cents per share)		Annualized Silver- Linked Dividend (cents per share)		Annualized Minimum Dividend (cents per share)		Annualized Dividends per Share: Silver- Linked and Minimum (cents per share)
	$20		0.25		1		1.5		2.5
	$25		1		4		1.5		5.5
	$30		1.5		6		1.5		7.5
	$35		2.5		10		1.5		11.5
	$40		3.5		14		1.5		15.5
	$45		4.5		18		1.5		19.5
	$50		5.5		22		1.5		23.5