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Note 2 - Acquisitions and Dispositions (Details) (USD $) | 12 Months Ended |  | 0 Months Ended |  |  | 0 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012 | May 15, 2012 Scenario, Previously Reported [Member] Bios International Corporation [Member] | Aug. 12, 2013 Nusonics Product Line Business [Member] | Nov. 06, 2013 Amega Scientific Corporation [Member] | May 15, 2012 Amega Scientific Corporation [Member] | Nov. 06, 2013 TempSys Inc [Member] | May 15, 2012 Bios International Corporation [Member] | Mar. 31, 2014 Bios International Corporation [Member] | Nov. 06, 2013 Minimum [Member] Amega Scientific Corporation [Member] | Nov. 06, 2013 Maximum [Member] Amega Scientific Corporation [Member]
Note 2 - Acquisitions and Dispositions (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 22,758,000 | $ 16,660,000 | $ 737,000 | [1] |  |  |  |  |  |  |  |  |
Business Acquisition Agreement Holdback Payment Period from Effective Date Less Any Losses Incurred by Buyer Payable to Seller |  |  |  |  |  |  | 3 years |  |  |  |  |  |
Business Acquisition Earn Out Period for Determination of Contingent Consideration |  |  |  |  |  |  | 3 years |  |  | 3 years |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low |  |  |  |  |  |  | 0 | 0 |  | 0 |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  |  |  |  | 10,000,000 | 10,000,000 |  | 6,710,000 |  |  |
Business Acquisition Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration |  |  |  |  |  |  |  |  |  |  |  | 31,625,000 | 43,500,000
Business Combination, Contingent Consideration, Liability | 1,620,000 | 2,140,000 |  |  | 2,140,000 |  | 500,000 |  |  | 2,140,000 | 1,120,000 |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  |  |  |  |  |  | 12,768,000 |  | 9,826,000 | 18,800,000 |  |  |
Business Acquisition Minimum Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration |  |  |  |  |  |  |  |  |  | 22,127,000 |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability | (1,020,000) |  |  |  |  |  |  |  |  |  | (1,020,000) |  |
Proceeds from Divestiture of Businesses | 661,000 |  |  |  |  | 661,000 |  |  |  |  |  |  |
Disposal Group Not Discontinued Operation Carrying Value |  |  |  |  |  | 193,000 |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business | $ 420,000 |  |  |  |  | $ 468,000 |  |  |  |  |  |  |
[1] | In December 2011, we settled the $600 holdback amount from our acquisition of the assets of Apex Laboratories, Inc. by paying $562 and returning $38 of accounts receivable.

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