Note 1 - The Company and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2014

Accounting Policies [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	March 31,
	2014		2013
Convertible debt		20,599,250		14,166,667
Stock options		4,377,874		5,780,608
Warrants		1,880,620		1,880,620
Restricted stock		1,325,402		122,044
Total anti-dilutive securities		28,183,146		21,949,939

Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]

	Fiscal Year Ended March 31,
	2014			2013
Medical segment
Stryker	$	4,911		$	3,052
Percentage of total segment net sales		35	%		26	%
Percentage of total net sales		29	%		20	%
Percentage of total accounts receivable, net		27	%		41	%
Industrial segment
Pratt & Whitney, a division of United Technology Corporation	$	527		$	944
Percentage of total segment net sales		18	%		26	%
Percentage of total net sales		3	%		6	%
Percentage of accounts receivable, net		9	%		2	%

Schedule of Inventory, Current [Table Text Block]

	March 31,
	2014		2013
Raw materials	$	3,456	$	4,352
Work in process		329		427
Finished goods		409		379
Inventories, net	$	4,194	$	5,158

Property, Plant and Equipment [Table Text Block]

Asset Classification	Estimated Useful Life
Machinery and equipment	7 - 15 years
Demo equipment	3 years
Furniture and fixtures	5 years
Leasehold improvements	lesser of lease period or 10 years
Intangible assets	6 - 15 years

Schedule of Deferred Debt Cost [Table Text Block]

	March 31,
Deferred debt cost	2014		2013
Gross carrying amount	$	-	$	2,060
Accumulated amortization		-		(816	)
Extinguishment of debt		-		(1,244	)
Net carrying amount	$	-	$	-

Schedule of Product Warranty Liability [Table Text Block]

	March 31,
	2014			2013
Warranty reserve at April 1	$	280		$	303
Warranties accrued during the fiscal year		60			230
Warranties settled during the fiscal year		(110	)		(253	)
Warranty reserve at March 31	$	230		$	280