CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated other comprehensive loss
Balance, shares at Jan. 31, 2019		8,475,929	(462,089)
Balance, amount at Jan. 31, 2019	$ 83,228,000	$ 85,000	$ (4,517,000)	$ 75,612,000	$ 14,300,000	$ (2,252,000)
Net income	930,000	0	0	0	930,000
Other comprehensive loss	(225,000)	0	$ 0	0	0	(225,000)
Stock-based compensation:
Restricted Stock Plan	251,000	0		251,000	0	0
Treasury stock purchased, inclusive of commissions, shares			(9,200)
Treasury stock purchased, inclusive of commissions, amount	(97,000)	$ 0	$ (97,000)	0	0	0
Balance, shares at Jul. 31, 2019		8,475,929	(471,289)
Balance, amount at Jul. 31, 2019	83,585,000	$ 85,000	$ (4,614,000)	75,361,000	15,230,000	(2,477,000)
Balance, shares at Apr. 30, 2019		8,475,929	(462,089)
Balance, amount at Apr. 30, 2019	82,895,000	$ 85,000	$ (4,517,000)	75,813,000	13,835,000	(2,321,000)
Net income	1,395,000	0	0	0	1,395,000	0
Other comprehensive loss	(156,000)	0	0	0	0	(156,000)
Stock-based compensation:
Restricted Stock Plan	(452,000)	$ 0	$ 0	(452,000)
Treasury stock purchased, inclusive of commissions, shares			(9,200)
Treasury stock purchased, inclusive of commissions, amount	(97,000)		$ (97,000)
Balance, shares at Jul. 31, 2019		8,475,929	(471,289)
Balance, amount at Jul. 31, 2019	83,585,000	$ 85,000	$ (4,614,000)	75,361,000	15,230,000	(2,477,000)
Balance, shares at Jan. 31, 2020		8,481,665	(509,242)
Balance, amount at Jan. 31, 2020	85,052,000	$ 85,000	$ (5,023,000)	75,171,000	17,581,000	(2,762,000)
Net income	17,973,000	0	0	0	17,973,000	0
Stock-based compensation:
Restricted Stock Plan	378,000	0	0	378,000	0	0
Treasury stock purchased, inclusive of commissions, amount	(55,000)	0	0	(55,000)	0	0
Other comprehensive income	9,000	$ 0	$ 0	0	0	9,000
Restricted stock issued, shares		7,479
Balance, shares at Jul. 31, 2020		8,489,144	(509,242)
Balance, amount at Jul. 31, 2020	103,357,000	$ 85,000	$ (5,023,000)	75,494,000	35,554,000	(2,753,000)
Balance, shares at Apr. 30, 2020		8,485,517	(509,242)
Balance, amount at Apr. 30, 2020	93,540,000	$ 85,000	$ (5,023,000)	75,314,000	26,215,000	(3,051,000)
Net income	9,339,000	0	0	0	9,339,000	0
Stock-based compensation:
Restricted Stock Plan	215,000	0	0	215,000	0	0
Treasury stock purchased, inclusive of commissions, amount	(35,000)	$ 0	$ 0	(35,000)	0	0
Other comprehensive income	298,000					298,000
Restricted stock issued, shares		3,627
Balance, shares at Jul. 31, 2020		8,489,144	(509,242)
Balance, amount at Jul. 31, 2020	$ 103,357,000	$ 85,000	$ (5,023,000)	$ 75,494,000	$ 35,554,000	$ (2,753,000)