The Company makes strategic investments in equity and debt securities of silver and gold exploration, development and royalty and streaming companies.


	At March 31, 2021
In thousands	Cost		Gross Unrealized Losses		Gross Unrealized Gains		Estimated Fair Value
Equity Securities
Integra Resources Corp.	$	7,500	$	—	$	707	$	8,207
Other	2		—		—		2
Equity securities	$	7,502	$	—	$	707	$	8,209


	At December 31, 2020
In thousands	Cost		Gross Unrealized Losses		Gross Unrealized Gains		Estimated Fair Value
Equity Securities
Metalla Royalty & Streaming Ltd.	$	166	$	—	$	875	$	1,041
Integra Resources Corp.	7,500		—		4,401		11,901
Other	2		(1)		—		1
Equity securities	$	7,668	$	(1)	$	5,276	$	12,943

On January 4, 2021, the Company completed the sale of 83,556 shares of common stock of Metalla Royalty & Streaming Ltd. (“Metalla”) (“Metalla Common Shares”) at an average price (net of commission) of $11.19 per Metalla Common Share for net proceeds of $0.9 million for a realized gain of $0.8 million.