Manufacturing Segment Data (Details 1) (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Jan. 31, 2012
Net Sales from Continuing Operations:
Net sales from continuing operations	$ 23,499,324	$ 25,833,494	$ 47,480,035	$ 51,418,322
External Sales from Continuing Operations:
Revenue from External Customers	23,499,324	25,833,494	47,480,035	51,418,322
Intersegment Sales from Continuing Operations:
Segment Reporting Information, Intersegment Revenue	7,272,477	6,647,744	12,761,742	11,953,206
Operating Profit (loss) from Continuing Operations:
Operating profit from continuing operations	151,973	825,123	176,911	2,401,560
Depreciation and Amortization Expense from Continuing Operations:
Depreciation and amortization	371,666	405,711	746,556	824,525
Interest Expense from Continuing Operations:
Interest expense	259,453	140,251	495,846	258,632
Income Tax Expense (benefits) from Continuing Operations:
Provision (benefit) for income taxes	(27,283)	97,856	(373,684)	505,606
Total Assets (at Balance Sheet Date):
Total assets	101,377,933	110,028,400	101,377,933	110,028,400	102,404,854
Long-lived Assets (at Balance Sheet Date)
Long-Lived Assets	13,792,540	11,895,133	13,792,540	11,895,133
USA [Member]
Net Sales from Continuing Operations:
Net sales from continuing operations	9,985,821	15,196,314	20,579,964	30,752,896
External Sales from Continuing Operations:
Revenue from External Customers	9,088,224	13,543,528	18,861,184	28,244,316
Intersegment Sales from Continuing Operations:
Segment Reporting Information, Intersegment Revenue	897,597	1,652,786	1,718,780	2,508,581
Operating Profit (loss) from Continuing Operations:
Operating profit from continuing operations	(787,508)	(229,293)	2,253,179	147,326
Depreciation and Amortization Expense from Continuing Operations:
Depreciation and amortization	151,868	163,231	290,989	353,114
Interest Expense from Continuing Operations:
Interest expense	145,544	87,599	245,566	161,702
Income Tax Expense (benefits) from Continuing Operations:
Provision (benefit) for income taxes	(241,936)	(94,055)	(745,327)	(19,769)
Total Assets (at Balance Sheet Date):
Total assets	31,851,220	41,027,491	31,851,220	41,027,491
Long-lived Assets (at Balance Sheet Date)
Long-Lived Assets	5,185,067	3,960,687	5,185,067	3,960,687
Other Countries [Member]
Net Sales from Continuing Operations:
Net sales from continuing operations	5,983,909	5,009,038	11,507,122	9,728,051
External Sales from Continuing Operations:
Revenue from External Customers	5,426,378	4,456,834	10,482,564	8,668,064
Intersegment Sales from Continuing Operations:
Segment Reporting Information, Intersegment Revenue	557,531	552,204	1,024,558	1,059,986
Operating Profit (loss) from Continuing Operations:
Operating profit from continuing operations	207,151	192,201	436,547	399,867
Depreciation and Amortization Expense from Continuing Operations:
Depreciation and amortization	54,425	36,463	104,237	70,433
Interest Expense from Continuing Operations:
Interest expense	51,214	57,611	103,537	115,904
Income Tax Expense (benefits) from Continuing Operations:
Provision (benefit) for income taxes	62,953	47,082	122,621	259,379
Total Assets (at Balance Sheet Date):
Total assets	17,266,496	15,503,646	17,266,496	15,503,646
Long-lived Assets (at Balance Sheet Date)
Long-Lived Assets	3,241,461	2,611,349	3,241,461	2,611,349
China [Member]
Net Sales from Continuing Operations:
Net sales from continuing operations	10,103,401	8,248,211	18,265,261	14,807,174
External Sales from Continuing Operations:
Revenue from External Customers	4,289,766	3,805,457	8,250,571	6,422,535
Intersegment Sales from Continuing Operations:
Segment Reporting Information, Intersegment Revenue	5,813,635	4,442,754	10,014,690	8,384,639
Operating Profit (loss) from Continuing Operations:
Operating profit from continuing operations	310,743	800,517	1,142,978	1,473,904
Depreciation and Amortization Expense from Continuing Operations:
Depreciation and amortization	84,808	80,625	171,968	157,530
Interest Expense from Continuing Operations:
Interest expense	0	0	0	0
Income Tax Expense (benefits) from Continuing Operations:
Provision (benefit) for income taxes	211,151	228,269	365,721	380,623
Total Assets (at Balance Sheet Date):
Total assets	24,960,350	21,845,949	24,960,350	21,845,949
Long-lived Assets (at Balance Sheet Date)
Long-Lived Assets	2,735,270	2,492,448	2,735,270	2,492,448
Brazil [Member]
Net Sales from Continuing Operations:
Net sales from continuing operations	4,698,670	4,027,675	9,889,430	8,083,407
External Sales from Continuing Operations:
Revenue from External Customers	4,694,956	4,027,675	9,885,716	8,083,407
Intersegment Sales from Continuing Operations:
Segment Reporting Information, Intersegment Revenue	3,714	0	3,714	0
Operating Profit (loss) from Continuing Operations:
Operating profit from continuing operations	(243,260)	(109,820)	131,290	(188,274)
Depreciation and Amortization Expense from Continuing Operations:
Depreciation and amortization	80,565	125,392	179,362	243,448
Interest Expense from Continuing Operations:
Interest expense	281,418	53,894	515,370	96,667
Income Tax Expense (benefits) from Continuing Operations:
Provision (benefit) for income taxes	(194,413)	(90,989)	(281,268)	(138,445)
Total Assets (at Balance Sheet Date):
Total assets	25,377,362	29,652,744	25,377,362	29,652,744
Long-lived Assets (at Balance Sheet Date)
Long-Lived Assets	2,630,742	2,830,649	2,630,742	2,830,649
India [Member]
Total Assets (at Balance Sheet Date):
Total assets	1,922,505	1,998,570	1,922,505	1,998,570
Long-lived Assets (at Balance Sheet Date)
Long-Lived Assets	0	0	0	0
Geographical Intersegment, Eliminations [Member]
Net Sales from Continuing Operations:
Net sales from continuing operations	(7,272,477)	(6,647,744)	(12,761,742)	(11,953,206)
Operating Profit (loss) from Continuing Operations:
Operating profit from continuing operations	664,847	171,518	719,275	568,737
Interest Expense from Continuing Operations:
Interest expense	(218,723)	(58,853)	(368,627)	(115,641)
Income Tax Expense (benefits) from Continuing Operations:
Provision (benefit) for income taxes	$ 134,962	$ 7,549	$ 164,569	$ 23,818