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Stock-Based Compensation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Cost of Goods Sold [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 65,000	$ 74,000	$ 193,000	$ 190,000
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	188,000	$ 189,000	566,000	$ 496,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 2,178,000		$ 2,178,000
Unrecognized compensation expense, weighted average period to be recognized			3 years
Restricted Stock Units (RSUs) [Member] | 2019 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards authorized (shares)	1,000,000		1,000,000
Granted in the period (shares)			94,695
Vested in period (shares)			45,600
Forfeited in period (shares)			0
Awards available for future issuance (shares)	677,305		677,305
Restricted Stock Units (RSUs) [Member] | 2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards authorized (shares)	2,000,000		2,000,000
Granted in the period (shares)			0
Vested in period (shares)			119,200
Forfeited in period (shares)			0
Awards available for future issuance (shares)	32,892		32,892
Director [Member] | Restricted Stock Awards [Member] | 2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in the period (shares)			0
Vested in period (shares)			59,385

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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