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BALANCE SHEET DETAILS (Details) - USD ($)
$ in Thousands
Apr. 30, 2019
Feb. 01, 2019
Jan. 31, 2019
Accrued expenses and other current liabilities:      
Research and development $ 539   $ 399
Payroll 391   371
Operating lease liability - current portion 260 $ 300  
Legal 65   45
Other 91   119
Accrued expenses and other current liabilities $ 1,346   $ 934