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, 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	2,076,000	0	0	0	2,076,000	0
Other comprehensive loss	(402,000)	$ 0	$ 0	0	0	(402,000)
Stock-based compensation, shares		2,189	0
Stock-based compensation, amount	(559,000)	$ 0	$ 0	(559,000)	0	0
Stock-based compensation: Restricted Stock Plan, shares		0	0
Stock-based compensation: Restricted Stock Plan, amount	(5,000)	$ 0	$ 0	(5,000)	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 Oct. 31, 2019		8,478,118	(471,289)
Balance, amount at Oct. 31, 2019	84,241,000	$ 85,000	$ (4,614,000)	75,048,000	16,376,000	(2,654,000)
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)
Net income	1,146,000	0	0	0	1,146,000	0
Other comprehensive loss	(177,000)	$ 0	$ 0	0	0	(177,000)
Stock-based compensation: Restricted Stock Plan, shares		2,189	0
Stock-based compensation: Restricted Stock Plan, amount	(308,000)	$ 0	$ 0	(308,000)	0	0
Treasury stock purchased, inclusive of commissions, shares		0	0
Treasury stock purchased, inclusive of commissions, amount	(5)		$ 0	(5,000)	0	0
Balance, shares at Oct. 31, 2019		8,478,118	(471,289)
Balance, amount at Oct. 31, 2019	84,241,000	$ 85,000	$ (4,614,000)	75,048,000	16,376,000	(2,654,000)
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	27,237,000	0	0	0	27,237,000	0
Other comprehensive loss	225,000	0	$ 0		0	225,000
Stock-based compensation: Restricted Stock Plan, shares			0
Stock-based compensation: Restricted Stock Plan, amount	1,186,000	$ 0	$ 0	1,186,000	0	0
Stock-based compensation: Restricted stock issued, shares		9,595
Stock-based compensation: Restricted stock issued, amount	0	$ 0	$ 0		0	0
Stock-based compensation: Return of shares in lieu of payroll withholding	(79,000)			(79,000)
Balance, shares at Oct. 31, 2020		8,491,260	(509,242)
Balance, amount at Oct. 31, 2020	113,621,000	$ 85,000	$ (5,023,000)	76,278,000	44,818,000	(2,537,000)
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)
Net income	9,264,000	0	0		9,264,000	0
Other comprehensive loss	216,000	$ 0	$ 0	0	0	216,000
Stock-based compensation: Restricted Stock Plan, amount	808,000			808,000
Stock-based compensation: Restricted stock issued, shares		2,116	0
Stock-based compensation: Restricted stock issued, amount				0	0
Stock-based compensation: Return of shares in lieu of payroll withholding	(24,000)			(24,000)
Balance, shares at Oct. 31, 2020		8,491,260	(509,242)
Balance, amount at Oct. 31, 2020	$ 113,621,000	$ 85,000	$ (5,023,000)	$ 76,278,000	$ 44,818,000	$ (2,537,000)