Major Customer Information (Details Textual) (USD $)	3 Months Ended								12 Months Ended
	Jan. 31, 2013	Oct. 26, 2012	Jul. 27, 2012	Apr. 27, 2012	Jan. 31, 2012	Oct. 28, 2011	Jul. 29, 2011	Apr. 29, 2011	Jan. 31, 2013	Jan. 31, 2012
Sales, net	$ 8,921,000	$ 7,267,000	$ 7,472,000	$ 7,361,000	$ 9,157,000	$ 7,320,000	$ 6,421,000	$ 6,709,000	$ 31,021,000	$ 29,607,000
Accounts receivable, net	5,408,000				5,190,000				5,408,000	5,190,000
Accounts Receivable Percentage	1000.00%				1000.00%				1000.00%	1000.00%
Us Government Agencies [Member]
Sales Revenue, Goods, Net, Percentage	33.00%				44.00%				33.00%	44.00%
Sales, net									10,275,000	13,112,000
Us Government Agencies [Member] | Direct [Member]
Sales, net									5,901,000	6,365,000
Us Government Agencies [Member] | Indirect [Member]
Sales, net									4,374,000	6,747,000
Foreign [Member]
Sales, net									8,085,000	5,903,000
Us Government [Member]
Sales Revenue, Goods, Net, Percentage	19.00%								19.00%
Accounts receivable, net					882,000					882,000
Korea Aerospace Industries [Member]
Sales Revenue, Goods, Net, Percentage	11.00%								11.00%
Accounts receivable, net	1,082,000								1,082,000
Carp Industries [Member]
Sales Revenue, Goods, Net, Percentage	10.00%								10.00%
Accounts receivable, net	704,000				654,000				704,000	654,000
Boeing Corporation [Member]
Sales Revenue, Goods, Net, Percentage	10.00%								10.00%
Alenia Aermacchi [Member]
Accounts receivable, net					$ 1,118,000					$ 1,118,000