XML 15 R61.htm IDEA: XBRL DOCUMENT v3.20.1
Short-Term and Long-Term Investments - Legal Maturities of Debt Investments (Details)
$ in Thousands
Jan. 31, 2020
USD ($)
Amortized Cost  
Less than one year $ 109,962
Due in 1-2 years 10,073
Amortized Cost 120,035
Estimated Fair Value  
Less than one year 110,067
Due in 1-2 years 10,076
Total $ 120,143