Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2022

Marketable Securities

Schedule of marketable equity securities

	Marketable equity securities at March 31, 2022
			Gross unrealized		Gross unrealized
	Cost		gains		losses			Fair value
Common shares	$	16,366,000	$	5,268,000	$	(5,476,000	)	$	16,158,000

	Marketable equity securities at December 31, 2021
			Gross unrealized		Gross unrealized
	Cost		gains		losses			Fair value
Common shares	$	53,475,000	$	32,000	$	(13,127,000	)	$	40,380,000