STOCK-BASED COMPENSATION - Expense (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2020	Apr. 30, 2019
STOCK-BASED COMPENSATION
Stock-based compensation expense	$ 123	$ 191
Total compensation costs not yet recognized	$ 600
Average remaining amortization period for recognition of expense	2 years 1 month 10 days
Research and development
STOCK-BASED COMPENSATION
Stock-based compensation expense	$ 2	103
Sales and marketing
STOCK-BASED COMPENSATION
Stock-based compensation expense	12	21
General and administrative
STOCK-BASED COMPENSATION
Stock-based compensation expense	$ 109	$ 67

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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