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Note 2 - Acquisitions and Dispositions (Details Textual) |  |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 15, 2014 USD ($) | Nov. 06, 2013 USD ($) | Nov. 06, 2013 USD ($) | Aug. 12, 2013 USD ($) | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Mar. 31, 2014 USD ($) | Sep. 30, 2016 | Mar. 31, 2016 CAD | Mar. 31, 2016 USD ($) | Jul. 06, 2015 CAD | Jul. 06, 2015 USD ($) | Apr. 15, 2015 USD ($) | Apr. 15, 2014 USD ($)
Infitrak Acquisition [Member] | Minimum [Member] | Contingent Consideration Year 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Sliding Scale of Growth |  |  |  |  |  |  |  |  |  |  | 30.00% | 30.00% |  |
Infitrak Acquisition [Member] | Minimum [Member] | Contingent Consideration Year 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Sliding Scale of Growth |  |  |  |  |  |  |  |  |  |  | 15.00% | 15.00% |  |
Infitrak Acquisition [Member] | Maximum [Member] | Contingent Consideration Year 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Sliding Scale of Growth |  |  |  |  |  |  |  |  |  |  | 70.00% | 70.00% |  |
Infitrak Acquisition [Member] | Maximum [Member] | Contingent Consideration Year 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Sliding Scale of Growth |  |  |  |  |  |  |  |  |  |  | 75.00% | 75.00% |  |
Infitrak Acquisition [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Payment Installments |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Infitrak Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low |  |  |  |  |  |  |  |  |  | $ 0 | CAD 0 |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  |  |  |  |  |  |  | 11,500,000 | CAD 15,000,000 |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  |  |  |  |  |  | CAD 9,271,000 | 9,037,000 |  |  |  |
Business Acquisition, Earn Out Period for Determination of Contingent Consideration |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  |  |  |  |  |  |  |  |  |  |  | $ 18,655,000 |  |
PCD Acquisition [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration | $ 9,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
PCD Acquisition [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration | 12,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |
PCD Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Payment of Contingent Consideration |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net | $ 5,550,000 |  |  |  |  |  |  |  |  |  |  |  |  |
BGI [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,268,000 | $ 10,268,000
Amega Scientific Corporation [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration |  | $ 31,625,000 | $ 31,625,000 |  |  |  |  |  |  |  |  |  |  |
Amega Scientific Corporation [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Revenue Required in Three Years Subsequent to Acquisition for Payment of Contingent Consideration |  | 43,500,000 | 43,500,000 |  |  |  |  |  |  |  |  |  |  |
Amega Scientific Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low |  | 0 | 0 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  | 10,000,000 | 10,000,000 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  | $ 500,000 | $ 500,000 |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Agreement Holdback, Payment Period from Effective Date Less Any Losses Incurred by Buyer Payable To Seller |  | 3 years | 3 years |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Earn Out Period for Determination of Contingent Consideration |  | 3 years | 3 years |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  | $ 12,768,000 | $ 12,768,000 |  |  |  |  |  |  |  |  |  |  |
TempSys Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net |  | $ 9,826,000 | $ 9,826,000 |  |  |  |  |  |  |  |  |  |  |
Nusonics Product Line Business [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  | $ 661,000 |  |  |  |  |  |  |  |  |  |
Disposal Group Not Discontinued Operation, Carrying Value |  |  |  | 193,000 |  |  |  |  |  |  |  |  |  |
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax |  |  |  | $ 468,000 |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  | $ 33,382,000 | $ 20,955,000 | $ 23,258,000 |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  |  |  |  |  | $ 812,000 |  |  |  | $ 4,430,000 |  |  |  |
Proceeds from Divestiture of Businesses |  |  |  |  |  |  | $ 661,000 |  |  |  |  |  |  |

X
- Definition Represents the holdback payment period from the effective date, less any losses incurred by buyer, payable to seller, as defined in the agreement. + References No definition available. + Details
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