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Note 1. The Company and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Mar. 31, 2013
Accounting Policies [Abstract]  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
 

March 31,

 
 

2013

2012

Convertible debt

    14,166,667     -

Stock options

    5,780,608     6,007,661

Warrants

    1,880,620     1,880,620

Restricted stock

    122,044     306,606

Total anti-dilutive securities

    21,949,939     8,194,887
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
 

Fiscal Year Ended March 31,

 
 

2013

2012

Medical segment

               

Stryker

  $ 3,052   $ 4,288

Percentage of total segment net sales

    26 %     31 %

Percentage of total net sales

    20 %     26 %

Percentage of total accounts receivable, net

    41 %     0 %
                 

Industrial segment

               

Pratt & Whitney, a division of United Technology Corporation

  $ 944   $ 138

Percentage of total segment net sales

    26 %     5 %

Percentage of total net sales

    6 %     1 %

Percentage of accounts receivable, net

    2 %     2 %
Schedule of Inventory, Current [Table Text Block]
 

March 31,

 
 

2013

2012

Raw materials

  $ 4,352   $ 3,271

Work in process

    427     432

Finished goods

    379     267

Inventories, net

  $ 5,158   $ 3,970
Property, Plant and Equipment, Estimated Useful Lives

Asset Classification

 

Estimated Useful Life (years)

Machinery and equipment

  7

-

15

Demo equipment

3

Furniture and fixtures

5

Leasehold improvements

lesser of lease period or 10

Intangible assets

6

-

15
Schedule of Deferred Debt Cost [Table Text Block]
 

March 31,

 

Deferred debt cost

2013

2012

Gross carrying amount

  $ 2,060   $ 2,060

Accumulated amortization

    (816 )     (544 )

Extinguishment of debt

    (1,244 )     -

Net carrying amount

  $ -   $ 1,516
Schedule of Product Warranty Liability [Table Text Block]
 

March 31,

 
 

2013

2012

Warranty reserve at April 1

  $ 303   $ 106

Warranties accrued during the fiscal year

    230     344

Warranties settled during the fiscal year

    (253 )     (147 )

Warranty reserve at March 31

  $ 280   $ 303