Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule for Available-for-Sale Securities

The following is a summary of available-for-sale securities as of June 30, 2020 (in thousands):

	Amortized Cost		Gross Unrealized Gain		Gross Unrealized (Losses)			Estimated Fair Value
Corporate debt securities	$	26,920	$	480	$	(8	)	$	27,392
Tax-exempt municipal securities	21,890		215		(74		)	22,031
Variable rate demand notes	5,600		—		—			5,600
Total	$	54,410	$	695	$	(82	)	$	55,023

The following is a summary of available-for-sale securities as of December 31, 2019 (in thousands):

	Amortized Cost		Gross Unrealized Gain		Gross Unrealized (Losses)			Estimated Fair Value
Corporate debt securities	$	42,584	$	165	$	(40	)	$	42,709
Tax-exempt municipal securities	23,301		112		(215		)	23,198
Variable rate demand notes	5,600		—		—			5,600
Total	$	71,485	$	277	$	(255	)	$	71,507

Schedule of Maturities of Marketable Securities

The following table summarizes the maturities of the Company’s marketable securities as of December 31, 2019 and June 30, 2020 (in thousands):

	December 31, 2019		June 30, 2020
Due within one year	$	34,874	$	23,106
Due after one year through five years	36,633		31,917
Total	$	71,507	$	55,023

Schedule of Proceeds from the Maturities of Available-for-Sale Securities

The following table summarizes the proceeds from the maturities and sales of available-for-sale securities for the three and six months ended June 30, 2019 and 2020 (in thousands):

	For the three months ended June 30,				For the six months ended June 30,
	2019		2020		2019		2020
Maturities of marketable securities	$	9,650	$	7,500	$	22,560	$	17,405
Sales of marketable securities	—		1,464		—		1,464
Total	$	9,650	$	8,964	$	22,560	$	18,869