Fair Value Measurements - Schedule of Company's Long-Term Debt Including the Current Portion Not Reflected in Financial Statements at Fair Value (Detail) - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-Term Debt and Related Current Maturities	$ 13,258	$ 18,857
Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-Term Debt and Related Current Maturities	13,258	18,857
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-Term Debt and Related Current Maturities	$ 13,034	$ 18,242