Segment Data (Details 1) (USD $)	3 Months Ended				12 Months Ended
	Apr. 30, 2015		Apr. 30, 2014		Jan. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	$ 24,819,000		$ 21,758,000	[1]
Operating Profit (Loss)	3,220,000		858,000	[1]
Depreciation and Amortization Expense	246,000		293,000	[1]
Interest Expense	(183,000)		(486,000)	[1]
Income Tax Expense (Benefits)	892,000		23,000	[1]
Total assets	99,530,000	[2]			93,208,000	[1],[2]
Property and Equipment	10,311,000				10,144,000	[1]
Capital Expenditures	310,000				880,000
Goodwill	871,000				871,000	[1]
External Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	24,820,000		21,760,000
Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	10,260,000		10,410,000
Operating Profit (Loss)	(140,000)		(40,000)
Depreciation and Amortization Expense	(30,000)		(10,000)
Interest Expense	0		(50,000)
Income Tax Expense (Benefits)	(30,000)		(20,000)
Total assets	(78,730,000)	[2]			(80,490,000)	[2]
Property and Equipment	(110,000)				(120,000)
Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	(10,260,000)		(10,410,000)
Unites States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	13,650,000		13,110,000
Operating Profit (Loss)	2,570,000		910,000
Depreciation and Amortization Expense	40,000		40,000
Interest Expense	0		0
Income Tax Expense (Benefits)	0		0
Total assets	39,000,000	[2]			36,350,000	[2]
Property and Equipment	2,280,000				2,300,000
Capital Expenditures	30,000				50,000
Goodwill	870,000				870,000
Unites States [Member] | External Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	12,840,000		12,200,000
Unites States [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	810,000		910,000
Total assets	32,820,000	[2]			30,140,000	[2]
Other foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	3,080,000		3,670,000
Operating Profit (Loss)	(100,000)		170,000
Depreciation and Amortization Expense	20,000		30,000
Interest Expense	20,000		40,000
Income Tax Expense (Benefits)	50,000		60,000
Total assets	18,000,000	[2]			18,000,000	[2]
Property and Equipment	1,830,000				1,770,000
Capital Expenditures	20,000				50,000
Other foreign [Member] | External Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	3,010,000		3,450,000
Other foreign [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	70,000		220,000
Total assets	10,220,000	[2]			10,320,000	[2]
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	6,870,000	[2]			6,750,000	[2]
Property and Equipment	70,000				70,000
Capital Expenditures	0				30,000
Europe [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	6,870,000	[2]			6,750,000	[2]
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	5,610,000		2,790,000
Operating Profit (Loss)	1,790,000		210,000
Depreciation and Amortization Expense	0		0
Interest Expense	0		10,000
Income Tax Expense (Benefits)	400,000		20,000
Europe [Member] | External Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	5,600,000		2,790,000
Europe [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	10,000
Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	860,000		920,000
Operating Profit (Loss)	(50,000)		(20,000)
Depreciation and Amortization Expense	30,000		10,000
Interest Expense	0		20,000
Income Tax Expense (Benefits)	0		(40,000)
Total assets	4,170,000	[2]			4,200,000	[2]
Property and Equipment	2,160,000				2,170,000
Capital Expenditures	0				30,000
Mexico [Member] | External Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	310,000		420,000
Mexico [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	550,000		500,000
Total assets	4,150,000	[2]			4,130,000	[2]
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	11,260,000		10,700,000
Operating Profit (Loss)	770,000		960,000
Depreciation and Amortization Expense	80,000		60,000
Interest Expense	40,000		(20,000)
Income Tax Expense (Benefits)	170,000		250,000
Total assets	34,470,000	[2]			33,040,000	[2]
Property and Equipment	2,740,000				2,700,000
Capital Expenditures	110,000				310,000
China [Member] | External Sales [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	3,060,000		2,900,000
China [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	8,200,000		7,800,000
Total assets	21,550,000	[2]			17,030,000	[2]
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	6,450,000	[2]			6,340,000	[2]
Brazil [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	6,450,000	[2]			6,330,000	[2]
Corporate [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	620,000		980,000
Operating Profit (Loss)	(1,620,000)		(1,330,000)
Depreciation and Amortization Expense	100,000		160,000
Interest Expense	120,000		490,000
Income Tax Expense (Benefits)	300,000		(250,000)
Total assets	70,720,000	[2]			70,330,000	[2]
Property and Equipment	1,300,000				1,200,000
Capital Expenditures	150,000				390,000
Corporate [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales from continuing operations	620,000		980,000
Total assets	17,170,000	[2]			18,070,000	[2]
India [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	(1,420,000)	[2]			(1,310,000)	[2]
Property and Equipment	40,000				50,000
Capital Expenditures	0				20,000
India [Member] | Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 300,000	[2]			$ 440,000	[2]

[1] Restated for discontinued operations.

[2] Negative assets reflect intersegment accounts eliminated in consolidation