Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value of Financial Instruments [Abstract]

Fair Value of Financial Instruments Measured on Recurring Basis

Items measured at fair value on a recurring basis are the Company’s investments. The following table sets forth the Company’s financial instruments that were measured at fair value on a recurring basis by level within the fair value hierarchy:

	Fair Value Measurements as of September 30, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Money market mutual funds (included in cash and cash equivalents)	$	45,496	$	-	$	-	$	45,496
United States Treasury securities (included in cash and cash equivalents)		9,985		-		-		9,985
		55,481		-		-		55,481
United States Treasury securities		102,133		-		-		102,133
Government Bonds		-		13,991		-		13,991
Corporate Bonds		-		26,242		-		26,242
Municipal Bonds		-		9,000		-		9,000
Investments		102,133		49,233		-		151,366
	$	157,614	$	49,233	$	-	$	206,847

	Fair Value Measurements as of December 31, 2018 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Money market mutual funds (included in cash and cash equivalents)	$	30,552	$	-	$	-	$	30,552
United States Treasury securities		101,777		-		-		101,777
Investments		101,777		-		-		101,777
	$	132,329	$	-	$	-	$	132,329