MANUFACTURING SEGMENT DATA (Details) (USD $)	3 Months Ended								12 Months Ended
	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2013	Jan. 31, 2012
Sales Revenue, Net	$ 23,399,000	$ 24,239,000	$ 23,499,000	$ 23,981,000	$ 20,165,000	$ 24,744,000	$ 25,833,000	$ 25,585,000	$ 95,117,539	$ 96,326,989
Sales Revenue, Percentage	100.00%				100.00%				100.00%	100.00%
Domestic [Member]
Sales Revenue, Net									40,760,000	50,560,000
Sales Revenue, Percentage	42.85%				52.49%				42.85%	52.49%
International [Member]
Sales Revenue, Net									$ 54,360,000	$ 45,770,000
Sales Revenue, Percentage	57.15%				47.51%				57.15%	47.51%