Segment Reporting (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019	Jan. 31, 2020
Net sales	$ 35,020,000.00	$ 27,470,000	$ 80,600,000	$ 52,160,000
External sales	35,020,000.00	27,470,000	80,600,000	52,160,000
Intersegment sales	17,630,000	15,940,000	30,920,000	27,230,000
Operating profit (loss)	9,730,000	2,640,000	22,100,000	2,320,000
Depreciation and amortization expense	480,000	450,000	930,000	840,000
Interest expense	0	40,000.00	20,000.00	70,000.00
Income tax expense	420,000	1,210,000	4,150,000	1,300,000
Capital expenditures	740,000	1,030,000.00
Total assets	121,620,000		121,620,000		$ 99,410,000
Total assets less intersegment	121,620,000		121,620,000		99,410,000
Property and equipment	9,920,000		9,920,000		10,110,000
Goodwill	870,000		870,000		870,000
USA
Net sales	15,550,000	15,620,000	39,680,000	29,510,000
External sales	14,450,000	14,440,000	37,560,000	27,310,000
Intersegment sales	1,100,000	1,180,000	2,120,000	2,210,000
Operating profit (loss)	1,360,000	690,000	5,700,000	(440,000)
Depreciation and amortization expense	200,000	220,000	420,000	420,000
Interest expense		20,000.00	10,000.00	30,000.00
Income tax expense	(840,000)	570,000	1,440,000	440,000
Capital expenditures	210,000	250,000	0	0
Total assets	89,290,000		89,290,000		88,080,000.00
Total assets less intersegment	52,890,000		52,890,000		49,940,000
Property and equipment	3,130,000		3,130,000		3,320,000
Goodwill	870,000		870,000		870,000
Other Foreign
Net sales	23.80	1,810,000	5,420,000	3,170,000
External sales	2,020,000.00	920,000	4,320,000	1,680,000
Intersegment sales	360,000	890,000	1,100,000	1,470,000
Operating profit (loss)	1,170,000	310,000	2,400,000	530,000
Depreciation and amortization expense	10,000.00	20,000.00	20,000.00	20,000.00
Interest expense		0	0	0
Income tax expense	0	0	10,000.00	0
Capital expenditures	60,000.00	10,000.00
Total assets	3,230,000		3,230,000		1,690,000
Total assets less intersegment	5,010,000.00		5,010,000.00		3,410,000
Property and equipment	180,000		180,000		150,000
Goodwill	0		0		0
Europe (UK)
Net sales	4,160,000	2,480,000	7,170,000	4,870,000
External sales	4,160,000	2,480,000	7,170,000	4,870,000
Intersegment sales	0	0	0	0
Operating profit (loss)	1,140,000	(50,000.00)	1,600,000	(40,000.00)
Depreciation and amortization expense	0	0	0	10,000.00
Income tax expense		10,000.00	270,000	10,000.00
Capital expenditures	0	10,000.00
Total assets less intersegment	6,850,000		6,850,000		4,520,000
Property and equipment	10,000.00		10,000.00		10,000.00
Mexico
Net sales	910,000	960,000	2,730,000	1,870,000
External sales	610,000	590,000	1,980,000	1,200,000
Intersegment sales	300,000	370,000	750,000	670,000
Operating profit (loss)	(200,000)	(230,000)	20,000.00	(410,000)
Depreciation and amortization expense	40,000.00	40,000.00	80,000.00	80,000.00
Income tax expense			0
Capital expenditures	260,000	170,000
Total assets	6,100,000		6,100,000		5,000,000.00
Total assets less intersegment	6,080,000.00		6,080,000.00		5,160,000
Property and equipment	2,350,000		2,350,000		2,170,000
Asia
Net sales	24,150,000	17,450,000	44,170,000	30,630,000
External sales	8,400,000	4,040,000.00	17,450,000	7,870,000
Intersegment sales	15,750,000	13,410,000	26,720,000	22,770,000
Operating profit (loss)	4,960,000	1,590,000	9,470,000	1,820,000
Depreciation and amortization expense	180,000	120,000	360,000	250,000
Income tax expense	820,000	360,000	1,720,000	500,000
Capital expenditures	110,000	580,000
Total assets	57,130,000		57,130,000		44,220,000
Total assets less intersegment	37,390,000		37,390,000		24,650,000
Property and equipment	3,020,000.00		3,020,000.00		3,190,000
Canada
Net sales	2,400,000	2,400,000	6,710,000	4,900,000
External sales	2,400,000	2,370,000	6,710,000	4,870,000
Intersegment sales		30,000.00		30,000.00
Operating profit (loss)	260,000	270,000	1,390,000	520,000
Depreciation and amortization expense	30,000.00	50,000.00	50,000.00	50,000.00
Income tax expense	70,000.00	170,000	380,000	220,000
Capital expenditures		0
Total assets	6,830,000		6,830,000		6,090,000.00
Total assets less intersegment	6,810,000		6,810,000		6,070,000.00
Property and equipment	1,110,000		1,110,000		1,150,000
Latin America
Net sales	3,100,000	2,690,000	5,640,000	4,440,000
External sales	2,980,000	2,630,000	5,410,000	4,360,000
Intersegment sales	120,000	60,000.00	230,000	80,000.00
Operating profit (loss)	1,120,000	70,000.00	1,690,000	240,000
Depreciation and amortization expense	10,000.00	10,000.00	20,000.00	20,000.00
Interest expense		20,000.00	10,000.00	40,000.00
Income tax expense	230,000	110,000	390,000	130,000
Capital expenditures	100,000	10,000.00
Total assets	6,600,000		6,600,000		5,770,000
Total assets less intersegment	6,590,000		6,590,000		5,660,000
Property and equipment	30,000.00		30,000.00		40,000.00
Intersegment
Net sales	(17,630,000)	(15,940,000)	(30,920,000)	(27,230,000)
External sales	0	0	0	0
Operating profit (loss)	(90,000.00)	(10,000.00)	(170,000)	(0.10)
Depreciation and amortization expense	10,000.00	(10,000.00)	(20,000.00)	$ (10,000.00)
Income tax expense	(50,000.00)	$ (10,000.00)	(60,000.00)
Total assets	(54,420,000)		(54,420,000)		(55,960,000)
Total assets less intersegment	0		0		0
Property and equipment	$ 90,000.00		$ 90,000.00		$ 80,000.00