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Critical Accounting Policies and Estimates - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Nov. 30, 2019
Jun. 01, 2019
Accrued Liabilities:    
Compensation and payroll taxes $ 3,264 $ 2,846
Accrued severance 500 520
Professional fees 552 471
Deferred revenue 1,624 2,260
Other accrued expenses 4,896 5,176
Accrued Liabilities $ 10,836 $ 11,273