XML 51 R52.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Fair Value Measurements - Schedule of Investments Measured at Fair Value on a Recurring Basis (Details)
$ in Thousands
Nov. 30, 2019
USD ($)
Fair Value Measurements, Recurring | Level 1 | Certificate of Deposits  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Investments measured at fair value $ 13,000