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Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2021

Investments, All Other Investments [Abstract]

Schedule of Cash and Marketable Securities by Significant Investment Category

The following tables show the Company’s cash and cash equivalents and marketable securities by significant investment category as of March 31, 2021 and December 31, 2020:

	2021
	Adjusted Cost		Unrealized Gain/(Loss)		Fair Value		Cash and Cash Equivalents		Current Marketable Securities		Investments
Cash and cash equivalents	$	20,140,000	$	-	$	20,140,000	$	20,140,000	$	-	$	-
Level 1				-
Money Market Funds		31,921,000		-		31,921,000		31,921,000		-		-
Marketable Securities		7,769,000		2,316,000		10,085,000		-		10,085,000		-
Level 2
Warrants		700,000		471,000		1,171,000		-		-		1,171,000
Total	$	60,530,000	$	2,787,000	$	63,317,000	$	52,061,000	$	10,085,000	$	1,171,000

	2020
	Adjusted Cost		Unrealized Gain/(Loss)		Fair Value		Cash and Cash Equivalents		Current Marketable Securities		Investment
Cash and cash equivalents	$	1,733,000	$	-	$	1,733,000	$	1,733,000	$	-	$	-
Level 1
Money Market Funds		3,493,000		-		3,493,000		3,493,000		-		-
Marketable Securities		5,641,000		3,495,000		9,136,000		-		9,136,000		-
Level 2
Warrants		700,000		356,000		1,056,000		-		-		1,056,000
Total	$	11,567,000	$	3,851,000	$	15,418,000	$	5,226,000	$	9,136,000	$	1,056,000