MARKETABLE SECURITIES

3 Months Ended

Mar. 31, 2021

Marketable Securities [Abstract]

MARKETABLE SECURITIES

5. MARKETABLE SECURITIES:

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at March 31, 2021, were as follows:

	Amortized		Gross Unrealized				Estimated Fair
(In thousands)	Cost		Gains		Losses		Market Value
Investments due in 3 months or less:
Commercial paper	$	1,999	$	—	$	—	$	1,999
Corporate securities		94,676		107		—		94,783
Total		96,675		107		—		96,782
Investments due in 4-12 months:
Commercial paper		19,983		—		—		19,983
Corporate securities		31,099		203		—		31,302
Total		51,082		203		—		51,285
Total marketable securities	$	147,757	$	310	$	—	$	148,067

Accrued interest receivable was $1.2 million at March 31, 2021 and was recorded within prepaid expenses and other current assets on the condensed consolidated balance sheet.

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at December 31, 2020, were as follows:

	Amortized		Gross Unrealized				Estimated Fair
(In thousands)	Cost		Gains		Losses		Market Value
Investments due in 3 months or less:
Commercial paper	$	43,660	$	—	$	—	$	43,660
Corporate securities		19,846		44		—		19,890
Total		63,506		44		—		63,550
Investments due in 4-12 months:
Corporate securities		125,922		846		—		126,768
Total		125,922		846		—		126,768
Total marketable securities	$	189,428	$	890	$	—	$	190,318

Accrued interest receivable was $0.8 million at December 31, 2020 and was recorded within prepaid expenses and other current assets on the condensed consolidated balance sheet.