BALANCE SHEET DETAILS - Intangible assets, Amortization Expense, Accrued Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Accrued liabilities:
Legal	$ 438	$ 55
Research and development	404	327
Payroll	368	412
Purchase commitment liability	215	263
Deferred Revenue	8	11
Other	170	108
Total	$ 1,603	$ 1,176