Deferred Costs	12 Months Ended
Jan. 31, 2020
Deferred Costs [Abstract]
Deferred Costs	Deferred Costs Deferred costs, which consist of deferred sales commissions, were $35.6 million and $30.9 million as of January 31, 2020 and 2019, respectively. Amortization expense for the deferred costs included in sales and marketing expenses in the consolidated statements of comprehensive income was $20.5 million, $18.4 million, and $16.6 million for fiscal years ended January 31, 2020, 2019, and 2018, respectively. There have been no impairment losses recorded in relation to the costs capitalized for any period presented.

Deferred costs, which consist of deferred sales commissions, were $35.6 million and $30.9 million as of January 31, 2020 and 2019, respectively. Amortization expense for the deferred costs included in sales and marketing expenses in the consolidated statements of comprehensive income was $20.5 million, $18.4 million, and $16.6 million for fiscal years ended January 31, 2020, 2019, and 2018, respectively. There have been no impairment losses recorded in relation to the costs capitalized for any period presented.