Note 4 - Detail of Certain Asset Accounts (Tables)

6 Months Ended

Sep. 26, 2014

Details Of Certain Balance Sheet Accounts Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

	September 26, 2014		March 31, 2014
Raw material	$	2,781,000	$	3,093,000
Work-in-process		836,000		954,000
Finished products		1,183,000		702,000
Inventories, net	$	4,800,000	$	4,749,000

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

	Weighted Average		September 26, 2014
	Lives in Years		Amortization Method	Carrying Value		Accumulated Amortization		Intangibles  Net
Customer list		15	Straight Line		$190		$119		$71
Trademarks		15	Cash Flow		2,270		1,352		918
Technology		10	Cash Flow		10,950		10,791		159
Distribution Rights		7	Straight Line		148		33		115
Patents pending					642		--		642
Patents		10	Straight Line		1,391		610		781
Total Intangibles					$15,591		$12,905		$2,686

	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	$	304
2016		388
2017		343
2018		339
2019		330
2020 & after		340
Total	$	2,044