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Critical Accounting Policies and Estimates - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Feb. 29, 2020
Jun. 01, 2019
Accrued Liabilities:    
Compensation and payroll taxes $ 3,406 $ 2,846
Accrued severance 439 520
Professional fees 604 471
Deferred revenue 1,916 2,260
Other accrued expenses 4,637 5,176
Accrued Liabilities $ 11,002 $ 11,273