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Note 2 - Significant Accounting Policies - Inventories (Details) - USD ($)
$ in Thousands
Jan. 31, 2019
Jan. 31, 2018
Raw materials $ 11,962 $ 17,166
Work in process 488 291
Finished goods 731 1,024
Subtotal 13,181 18,481
Less allowance 892 1,625
Inventories $ 12,289 $ 16,856