Financial Instruments

12 Months Ended

Dec. 31, 2019

Investments, All Other Investments [Abstract]

Financial Instruments

11. FINANCIAL INSTRUMENTS

The estimated fair value of the Company's financial instruments at December 31, 2019 and 2018 follows:

	2019				2018
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Cash	$	15,229,000	$	15,229,000	$	14,036,000	$	14,036,000
Restricted cash		795,000		795,000		363,000		363,000
Long-term investments		1,150,000		1,150,000		2,358,000		2,358,000
Accounts receivable		3,190,000		3,190,000		2,615,000		2,615,000

The fair value amounts for each of the financial instruments listed above approximate carrying amounts due to the short maturities of these instruments.