Related-Party Transactions	12 Months Ended
Jan. 31, 2020
Related Party Transactions [Abstract]
Related-Party Transactions	16. Related-Party Transactions The Company considers an entity to be a related party if it owns more than 10% of the Company’s total voting stock at the end of each reporting period or if an officer or employee of an entity also serves on the Company’s board of directors or if it is a significant shareholder and has material business transactions with the Company. The Company enters into software license agreements with Cadence from time to time. The Chief Executive Officer of Cadence, who is also a Director of Cadence, was a member of the Company’s Board of Directors until June 7, 2017. Starting from fiscal year 2019, Cadence was no longer a related party of the Company. The Company paid $3.6 million of license fee to Cadence for the fiscal years ended January 31, 2020, 2019 and 2018, respectively. License amortization expense related to these agreements included in research and development expense was approximately $4.2 million, $3.4 million and $3.2 million for the fiscal years ended January 31, 2020, 2019 and 2018, respectively.

Related-Party Transactions

12 Months Ended

Jan. 31, 2020

16. Related-Party Transactions

The Company considers an entity to be a related party if it owns more than 10% of the Company’s total voting stock at the end of each reporting period or if an officer or employee of an entity also serves on the Company’s board of directors or if it is a significant shareholder and has material business transactions with the Company.

The Company enters into software license agreements with Cadence from time to time. The Chief Executive Officer of Cadence, who is also a Director of Cadence, was a member of the Company’s Board of Directors until June 7, 2017. Starting from fiscal year 2019, Cadence was no longer a related party of the Company. The Company paid $3.6 million of license fee to Cadence for the fiscal years ended January 31, 2020, 2019 and 2018, respectively. License amortization expense related to these agreements included in research and development expense was approximately $4.2 million, $3.4 million and $3.2 million for the fiscal years ended January 31, 2020, 2019 and 2018, respectively.