Investments

3 Months Ended

Apr. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Investments

Note 3. Investments

The amortized costs, unrealized gains and losses and estimated fair values of the Company’s short-term investments were as follows (in thousands):

	April 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
U.S. government securities	$	22,033	$	144	$	—	$	22,177
Corporate bonds	41,503		188		—		41,691
Commercial paper	24,030		—		—		24,030
Total short-term investments	$	87,566	$	332	$	—	$	87,898

	January 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
U.S. government securities	$	34,053	$	41	$	—	$	34,094
Corporate bonds	45,601		81		—		45,682
Commercial paper	37,886		—		—		37,886
Total short-term investments	$	117,540	$	122	$	—	$	117,662

There were no material realized gains or losses from sales of marketable securities that were reclassified out of accumulated other comprehensive (loss) income into investment income during the three months ended April 30, 2020 and 2019. All securities had stated effective maturities of less than two years as of April 30, 2020.