BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - ASU 2016-13 (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Feb. 01, 2020	Jan. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated deficit	$ (112,544)		$ (105,590)
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, Allowance for Credit Loss		$ 1,100
Deferred Tax Assets, Net		200
Accumulated deficit		$ 900