Manufacturing Segment Data (Details 1) (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012	Jan. 31, 2013
Net Sales:
Net sales	$ 24,639,006	$ 23,499,324	$ 46,375,996	$ 47,480,035
External Sales:
Revenue from External Customers	24,640,000	23,500,000	46,380,000	47,480,000
Intersegment Sales:
Intersegment Revenue	10,110,000	7,270,000	18,390,000	12,760,000
Operating Profit (Loss):
Operating Profit (Loss)	1,296,738	151,973	1,060,107	176,911
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	340,000	370,000	777,214	746,556
Interest Expense:
Interest Expense	467,293	259,453	741,187	495,846
Income Tax Expense (Benefits):
Income Tax Expense (benefits)	(3,610,695)	(27,283)	(3,432,002)	(373,684)
Total Assets (at Balance Sheet Date):
Total assets	86,005,536	101,380,000	86,005,536	101,380,000	83,318,003
Long-Lived Assets (at Balance Sheet Date)
Long-Lived Assets	12,460,000	13,790,000	12,460,000	13,790,000
USA [Member]
Net Sales:
Net sales	13,470,000	9,990,000	26,290,000	20,580,000
External Sales:
Revenue from External Customers	12,320,000	9,090,000	24,190,000	18,860,000
Intersegment Sales:
Intersegment Revenue	1,150,000	900,000	2,100,000	1,720,000
Operating Profit (Loss):
Operating Profit (Loss)	480,000	(790,000)	770,000	(2,250,000)
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	160,000	150,000	350,000	290,000
Interest Expense:
Interest Expense	280,000	150,000	410,000	250,000
Income Tax Expense (Benefits):
Income Tax Expense (benefits)	(3,920,000)	(240,000)	(3,860,000)	(750,000)
Total Assets (at Balance Sheet Date):
Total assets	29,480,000	32,400,000	29,480,000	32,400,000
Long-Lived Assets (at Balance Sheet Date)
Long-Lived Assets	3,350,000	3,780,000	3,350,000	3,780,000
Other foreign [Member]
Net Sales:
Net sales	6,320,000	5,430,000	12,180,000	10,430,000
External Sales:
Revenue from External Customers	5,580,000	5,260,000	10,880,000	10,210,000
Intersegment Sales:
Intersegment Revenue	740,000	170,000	1,300,000	220,000
Operating Profit (Loss):
Operating Profit (Loss)	310,000	220,000	500,000	510,000
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	40,000	50,000	80,000	90,000
Interest Expense:
Interest Expense	60,000	40,000	80,000	80,000
Income Tax Expense (Benefits):
Income Tax Expense (benefits)	80,000	60,000	150,000	120,000
Total Assets (at Balance Sheet Date):
Total assets	15,740,000	13,240,000	15,740,000	13,240,000
Long-Lived Assets (at Balance Sheet Date)
Long-Lived Assets	2,290,000	2,420,000	2,290,000	2,420,000
Mexico [Member]
Net Sales:
Net sales	830,000	560,000	1,460,000	1,070,000
External Sales:
Revenue from External Customers	330,000	170,000	510,000	270,000
Intersegment Sales:
Intersegment Revenue	500,000	390,000	950,000	800,000
Operating Profit (Loss):
Operating Profit (Loss)	30,000	(10,000)	(80,000)	(70,000)
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	10,000	10,000	30,000	20,000
Interest Expense:
Interest Expense	20,000	10,000	40,000	20,000
Income Tax Expense (Benefits):
Income Tax Expense (benefits)	10,000	0	10,000	10,000
Total Assets (at Balance Sheet Date):
Total assets	3,460,000	3,480,000	3,460,000	3,480,000
Long-Lived Assets (at Balance Sheet Date)
Long-Lived Assets	2,160,000	2,220,000	2,160,000	2,220,000
China [Member]
Net Sales:
Net sales	12,430,000	10,100,000	21,360,000	18,270,000
External Sales:
Revenue from External Customers	4,780,000	4,290,000	7,390,000	8,250,000
Intersegment Sales:
Intersegment Revenue	7,650,000	5,810,000	13,970,000	10,020,000
Operating Profit (Loss):
Operating Profit (Loss)	1,210,000	310,000	1,600,000	1,140,000
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	50,000	80,000	130,000	170,000
Interest Expense:
Interest Expense	0	0	0	0
Income Tax Expense (Benefits):
Income Tax Expense (benefits)	330,000	210,000	480,000	370,000
Total Assets (at Balance Sheet Date):
Total assets	26,100,000	24,960,000	26,100,000	24,960,000
Long-Lived Assets (at Balance Sheet Date)
Long-Lived Assets	2,480,000	2,740,000	2,480,000	2,740,000
Brazil [Member]
Net Sales:
Net sales	1,700,000	4,690,000	3,480,000	9,890,000
External Sales:
Revenue from External Customers	1,630,000	4,690,000	3,410,000	9,890,000
Intersegment Sales:
Intersegment Revenue	70,000	0	70,000	0
Operating Profit (Loss):
Operating Profit (Loss)	(880,000)	(240,000)	(1,810,000)	130,000
Depreciation and Amortization Expense:
Depreciation and Amortization Expense	80,000	80,000	190,000	180,000
Interest Expense:
Interest Expense	280,000	280,000	530,000	520,000
Income Tax Expense (Benefits):
Income Tax Expense (benefits)	0	(190,000)	0	(280,000)
Total Assets (at Balance Sheet Date):
Total assets	10,000,000	25,380,000	10,000,000	25,380,000
Long-Lived Assets (at Balance Sheet Date)
Long-Lived Assets	2,180,000	2,630,000	2,180,000	2,630,000
India [Member]
Total Assets (at Balance Sheet Date):
Total assets	740,000	1,920,000	740,000	1,920,000
Long-Lived Assets (at Balance Sheet Date)
Long-Lived Assets	0	0	0	0
Intersegment Elimination [Member]
Net Sales:
Net sales	(10,110,000)	(7,270,000)	(18,390,000)	(12,760,000)
Operating Profit (Loss):
Operating Profit (Loss)	150,000	660,000	80,000	720,000
Interest Expense:
Interest Expense	(170,000)	(220,000)	(320,000)	(370,000)
Income Tax Expense (Benefits):
Income Tax Expense (benefits)	$ (110,000)	$ 130,000	$ (210,000)	$ 160,000