Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS - Contingent acquisition liabilities (Details)

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FAIR VALUE OF FINANCIAL INSTRUMENTS - Contingent acquisition liabilities (Details) - Contingent consideration - USD ($)
$ in Thousands
3 Months Ended
May 31, 2019
Feb. 28, 2019
Nov. 30, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Beginning balance $ 0 $ 5,882 $ 5,488
Change in Fair Value 2,961 (5,602) 394
Cash payment   (140)  
Settled in shares   (140)  
Ending balance $ 2,961 $ 0 $ 5,882