CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (UNAUDITED) - USD ($)	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings	Accumulated other comprehensive loss
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
Other comprehensive income (loss)	9,000	$ 0	0	0	0	9,000
Stock-based compensation:, shares		7,479
Stock-based compensation:, amount	0	$ 0	0	0	0	0
Restricted Stock Plan	378,000	0	0	378,000	0	0
Return of shares in lieu of payroll withholding	(55,000)	$ 0	$ 0	(55,000)	0	0
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
Other comprehensive income (loss)	298,000	0	0	0	0	298,000
Restricted Stock Plan	215,000	0	0	215,000	0	0
Return of shares in lieu of payroll withholding	(35,000)	$ 0	0	(35,000)	0	0
Restricted stock issued, shares		3,627
Restricted stock issued, amount	0	$ 0	$ 0	0	0	0
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 Jan. 31, 2021		8,498,457	(509,242)
Balance, amount at Jan. 31, 2021	122,918,000	$ 85,000	$ (5,023,000)	76,781,000	52,687,000	(1,612,000)
Net income	7,199,000	0	0	0	7,199,000	0
Other comprehensive income (loss)	(64,000)	0	0	0	0	(64,000)
Restricted Stock Plan	608,000	0	0	608,000	0	0
Return of shares in lieu of payroll withholding	(462,000)	$ 0	0	(462,000)	0	0
Restricted stock issued, shares		43,915
Restricted stock issued, amount	1,000	$ 1,000	$ 0	0	0	0
Treasury stock purchased, shares			(227,454)
Treasury stock purchased, amount	(4,994,000)	$ 0	$ (4,994,000)	0	0	0
Balance, shares at Jul. 31, 2021		8,542,372	(736,696)
Balance, amount at Jul. 31, 2021	125,206,000	$ 86,000	$ (10,017,000)	76,927,000	59,886,000	(1,676,000)
Balance, shares at Apr. 30, 2021		8,542,235	(509,242)
Balance, amount at Apr. 30, 2021	127,380,000	$ 86,000	$ (5,023,000)	76,656,000	57,328,000	(1,667,000)
Net income	2,558,000	0	0	0	2,558,000	0
Other comprehensive income (loss)	(9,000)	0	0	0	0	(9,000)
Restricted Stock Plan	271,000	0	0	271,000	0	0
Return of shares in lieu of payroll withholding	0	$ 0	0	0	0	0
Restricted stock issued, shares		137
Restricted stock issued, amount	0	$ 0	$ 0	0	0	0
Treasury stock purchased, shares			(227,454)
Treasury stock purchased, amount	(4,994,000)	$ 0	$ (4,994,000)	0	0	0
Balance, shares at Jul. 31, 2021		8,542,372	(736,696)
Balance, amount at Jul. 31, 2021	$ 125,206,000	$ 86,000	$ (10,017,000)	$ 76,927,000	$ 59,886,000	$ (1,676,000)