Note 4 - Detail of Certain Asset Accounts (Tables)

3 Months Ended

Jun. 27, 2014

Details Of Certain Balance Sheet Accounts Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	June 27, 2014		March 31, 2014
Raw material	$	2,694,000	$	3,093,000
Work-in-process		1,039,000		954,000
Finished products		952,000		702,000
Inventories, net	$	4,685,000	$	4,749,000

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	Weighted Average		June 27, 2014
	Lives in Years		Amortization Method	Carrying Value		Accumulated Amortization		Intangibles Net
Customer list		15	Straight Line	$	190	$	116	$	74
Trademarks		15	Cash Flow		2,270		1,309		961
Technology		10	Cash Flow		10,950		10,705		245
Distribution Rights		7	Straight Line		148		28		120
Patents pending					603		--		603
Patents		10	Straight Line		1,335		566		769
Total Intangibles				$	15,496	$	12,724	$	2,772

	Weighted  Average		March 31, 2014
	Lives in Years		Amortization Method	Carrying Value		Accumulated Amortization		Intangibles Net
Customer list		15	Straight Line	$	190	$	113	$	77
Trademarks		15	Cash Flow		2,270		1,267		1,003
Technology		10	Cash Flow		10,950		10,672		278
Distribution Rights		7	Straight Line		148		23		125
Patents pending					795		--		795
Patents		10	Straight Line		1,108		444		664
Total Intangibles				$	15,461	$	12,519	$	2,942

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Intangible Assets and Patents
Remainder of 2015	$	368
2016		489
2017		336
2018		332
2019		325
2020 & after		319
Total	$	2,169