Segment Reporting (Details 1) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jan. 31, 2019
Net sales		$ 27,470	$ 25,620	$ 52,160	$ 49,960
External sales		27,470	25,620	52,160	49,960
Intersegment sales		15,940	12,820	27,230	25,140
Operating profit (loss)		2,638	1,646	2,323	4,063
Depreciation and amortization expense		450	240	836	428
Interest expense		38	37	72	68
Income tax expense		1,208	622	1,297	1,139
Capital expenditures		410	950	580	1,220
Total assets		101,385		101,385		$ 94,723
Total assets less intersegment		101,390		101,390		94,720
Property and equipment		10,565		10,565		10,781
Goodwill		871		871		871
USA
Net sales		15,620	14,760	29,510	28,070
External sales		14,440	13,360	27,310	25,710
Intersegment sales		1,180	1,400	2,210	2,360
Operating profit (loss)		2,620	2,150	3,430	4,780
Depreciation and amortization expense		40	30	170	60
Capital expenditures		260	340	320	310
Total assets		69,460		69,460		67,260
Total assets less intersegment		32,330		32,330		29,760
Property and equipment		3,800		3,800		870
Goodwill		870		870		870
Other Foreign
Net sales		1,810	1,550	3,170	3,040
External sales		920	660	1,680	1,490
Intersegment sales		890	890	1,470	1,550
Operating profit (loss)		310	140	530	180
Depreciation and amortization expense		20	10	20	30
Capital expenditures		10	730	10	770
Total assets		1,530		1,530		1,540
Total assets less intersegment		3,450		3,450		2,850
Property and equipment		190		190		190
Europe (UK)
Net sales		2,480	2,560	4,870	5,130
External sales		2,480	2,560	4,870	5,130
Operating profit (loss)		(50)	90	(40)	180
Depreciation and amortization expense		0	0	10	10
Income tax expense		10	20	10	40
Total assets		5,440		5,440		4,370
Total assets less intersegment		5,440		5,440		4,360
Property and equipment		10		10		10
Mexico
Net sales		960	1,210	1,870	2,680
External sales		590	820	1,200	1,930
Intersegment sales		370	390	670	750
Operating profit (loss)		(230)	80	(410)	210
Depreciation and amortization expense		40	30	80	60
Capital expenditures		(10)	30	50	110
Total assets		5,130		5,130		5,000
Total assets less intersegment		5,210		5,210		5,130
Property and equipment		2,120		2,120		2,140
Asia
Net sales		17,450	13,750	30,630	27,590
External sales		4,040	4,130	7,870	8,080
Intersegment sales		13,410	9,620	22,770	19,510
Operating profit (loss)		1,590	570	1,820	1,150
Depreciation and amortization expense		120	100	250	150
Income tax expense		360	360	500	510
Capital expenditures		140	(150)	190	30
Total assets		43,380		43,380		39,520
Total assets less intersegment		23,320		23,320		20,970
Property and equipment		3,120		3,120		3,170
Canada
Net sales		2,400	2,100	4,900	4,310
External sales		2,370	2,100	4,870	4,300
Intersegment sales		30	0	30	10
Operating profit (loss)		270	60	520	440
Depreciation and amortization expense		50	20	50	30
Income tax expense		170	70	220	150
Capital expenditures					0
Total assets		6,110		6,110		7,470
Total assets less intersegment		6,090		6,090		6,640
Property and equipment		1,200		1,200		1,260
Latin America
Net sales		2,690	2,120	4,440	3,530
External sales		2,630	1,990	4,360	3,320
Intersegment sales		60	130	80	21
Operating profit (loss)		70	220	240	360
Depreciation and amortization expense		10	10	20	20
Interest expense		20	20	30	30
Income tax expense		110	40	130	60
Capital expenditures		10	0	10
Total assets		5,940		5,940		7,420
Total assets less intersegment		5,970		5,970		5,270
Property and equipment		60		60		70
Corporate
Net sales		0	390	0	750
Intersegment sales		0	390	0	75
Operating profit (loss)		(1,930)	(15,690)	(3,870)	(3,350)
Depreciation and amortization expense		180	50	250	100
Interest expense		20	20	40	40
Income tax expense		570	15	440	340
Total assets		20,250		20,250		25,070
Total assets less intersegment		19,580		19,580		19,740
Intersegment
Net sales		(15,940)	(12,820)	(27,230)	(25,140)
Operating profit (loss)		(10)	(100)	100	110
Depreciation and amortization expense		(10)	(10)	(10)	(30)
Income tax expense		(10)	$ (20)	0	$ 40
Total assets	[1]	(55,850)		(55,850)		(62,930)
Property and equipment		$ 70		$ 70		$ 70

[1] Negative assets reflect intersegment amounts eliminated in consolidation.