Segment Data (Details 1) (USD $)	3 Months Ended			12 Months Ended
	Apr. 30, 2014		Apr. 30, 2013	Jan. 31, 2014
Net Sales:
Net sales	$ 23,507,228		$ 21,736,990
External Sales:
Revenue from External Customers	23,510,000		21,740,000
Intersegment Sales:
Intersegment Revenue	10,410,000		8,280,000
Operating Profit (Loss):
Operating Profit (Loss)	582,450		(236,631)
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	374,596		434,436
Interest Expense:
Interest Expense	639,958		273,435
Income Tax Expense (Benefits):
Income tax expense	23,402		178,693
Total Assets:
Total assets	88,208,099	[1]		83,749,525	[1]
Property and Equipment:
Long-Lived Assets	12,090,000	[1]		12,070,000	[1]
Capital Expenditures:
Capital Expenditures	90,000	[1]		830,000	[1]
Goodwill
Goodwill	871,297	[1]		871,297	[1]
USA [Member]
Net Sales:
Net sales	13,110,000		12,300,000
External Sales:
Revenue from External Customers	12,200,000		11,860,000
Intersegment Sales:
Intersegment Revenue	910,000		440,000
Operating Profit (Loss):
Operating Profit (Loss)	910,000		1,420,000
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	40,000		60,000
Interest Expense:
Interest Expense	0		0
Income Tax Expense (Benefits):
Income tax expense	0		0
Total Assets:
Total assets	30,260,000	[1]		28,880,000	[1]
Property and Equipment:
Long-Lived Assets	2,370,000	[1]		2,420,000	[1]
Capital Expenditures:
Capital Expenditures	0	[1]		80,000	[1]
Goodwill
Goodwill	870,000	[1]		870,000	[1]
Other foreign [Member]
Net Sales:
Net sales	6,460,000		5,860,000
External Sales:
Revenue from External Customers	6,240,000		5,310,000
Intersegment Sales:
Intersegment Revenue	220,000		550,000
Operating Profit (Loss):
Operating Profit (Loss)	380,000		180,000
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	30,000		50,000
Interest Expense:
Interest Expense	50,000		30,000
Income Tax Expense (Benefits):
Income tax expense	80,000		70,000
Total Assets:
Total assets	21,300,000	[1]		19,930,000	[1]
Property and Equipment:
Long-Lived Assets	2,100,000	[1]		2,140,000	[1]
Capital Expenditures:
Capital Expenditures	0	[1]		80,000	[1]
Mexico [Member]
Net Sales:
Net sales	920,000		620,000
External Sales:
Revenue from External Customers	420,000		180,000
Intersegment Sales:
Intersegment Revenue	500,000		440,000
Operating Profit (Loss):
Operating Profit (Loss)	(20,000)		(100,000)
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	10,000		10,000
Interest Expense:
Interest Expense	20,000		10,000
Income Tax Expense (Benefits):
Income tax expense	(40,000)		0
Total Assets:
Total assets	3,730,000	[1]		3,730,000	[1]
Property and Equipment:
Long-Lived Assets	2,080,000	[1]		2,090,000	[1]
Capital Expenditures:
Capital Expenditures	0	[1]		10,000	[1]
China [Member]
Net Sales:
Net sales	10,700,000		8,930,000
External Sales:
Revenue from External Customers	2,900,000		2,610,000
Intersegment Sales:
Intersegment Revenue	7,800,000		6,320,000
Operating Profit (Loss):
Operating Profit (Loss)	960,000		390,000
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	60,000		70,000
Interest Expense:
Interest Expense	(20,000)		0
Income Tax Expense (Benefits):
Income tax expense	250,000		150,000
Total Assets:
Total assets	29,520,000	[1]		30,110,000	[1]
Property and Equipment:
Long-Lived Assets	2,590,000	[1]		2,640,000	[1]
Capital Expenditures:
Capital Expenditures	10,000	[1]		440,000	[1]
Brazil [Member]
Net Sales:
Net sales	1,750,000		1,780,000
External Sales:
Revenue from External Customers	1,750,000		1,780,000
Operating Profit (Loss):
Operating Profit (Loss)	(280,000)		(930,000)
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	80,000		110,000
Interest Expense:
Interest Expense	150,000		250,000
Total Assets:
Total assets	8,520,000	[1]		6,920,000	[1]
Property and Equipment:
Long-Lived Assets	1,970,000	[1]		1,860,000	[1]
Capital Expenditures:
Capital Expenditures	0	[1]		90,000	[1]
Corporate [Member]
Net Sales:
Net sales	980,000		530,000
Intersegment Sales:
Intersegment Revenue	980,000		530,000
Operating Profit (Loss):
Operating Profit (Loss)	(1,330,000)		(1,130,000)
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	150,000		130,000
Interest Expense:
Interest Expense	490,000		130,000
Income Tax Expense (Benefits):
Income tax expense	(250,000)		60,000
Total Assets:
Total assets	(3,960,000)	[1]		(4,630,000)	[1]
Property and Equipment:
Long-Lived Assets	960,000	[1]		910,000	[1]
Capital Expenditures:
Capital Expenditures	70,000	[1]		130,000	[1]
Intersegment Elimination [Member]
Net Sales:
Net sales	(10,410,000)		(8,280,000)
Operating Profit (Loss):
Operating Profit (Loss)	(40,000)		(70,000)
Interest Expense:
Interest Expense	(50,000)		(150,000)
Income Tax Expense (Benefits):
Income tax expense	(20,000)		(100,000)
India [Member]
Total Assets:
Total assets	(1,160,000)	[1]		(1,190,000)	[1]
Property and Equipment:
Long-Lived Assets	20,000	[1]		10,000	[1]
Capital Expenditures:
Capital Expenditures	$ 10,000	[1]		$ 0	[1]

[1] Negative assets reflect intersegment accounts eliminated in consolidation