Contingencies (Details Textual) - USD ($)	12 Months Ended
Jan. 31, 2020	Jan. 31, 2019
Loss Contingencies [Line Items]
Liability retention losses	$ 30,000,000
Expected future losses	$ 1,700,000	$ 1,265,000
Estimated payout period	5 years
Discount rate	4.00%	4.00%
Product and General Liability [Member]
Loss Contingencies [Line Items]
Self insurance reserve	$ 250,000
Workers Compensation [Member]
Loss Contingencies [Line Items]
Self insurance reserve	250,000
Automobile Losses [Member]
Loss Contingencies [Line Items]
Self insurance reserve	$ 50,000

Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_SelfInsuranceReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant