Retirement Plans (Life Insurance) (Details) - USD ($)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Retirement Benefits [Abstract]
Liability for Future Policy Benefits, Life	$ 9,102,000	$ 9,095,000
Life Insurance, Corporate or Bank Owned, Amount	2,350,000
Liability beginning of year	2,088,000	2,184,000
Accretion expense	49,000	54,000
Present value of death benefits paid	(100,000)	(150,000)
Liability end of year	2,037,000	2,088,000
Cash surrender value	2,098,000	2,092,000
Death benefits received from life insurance policy	$ 4,256,000	$ 4,486,000