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Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) (USD $) | 7 Months Ended | 12 Months Ended |  | 12 Months Ended |  |  | 12 Months Ended
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Oct. 30, 2013 | Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012 | Oct. 02, 2012 | Mar. 31, 2014 Building [Member] Maximum [Member] | Mar. 31, 2014 Equipment [Member] Maximum [Member] | Mar. 31, 2014 Computer Equipment [Member] Maximum [Member] | Mar. 31, 2013 Reclassified from Retained Earnings to Common Stock [Member] | Mar. 31, 2011 Reclassified from Retained Earnings to Common Stock [Member] | Mar. 31, 2014 Common Stock [Member] | Mar. 31, 2013 Common Stock [Member] | Mar. 31, 2012 Common Stock [Member] | Mar. 31, 2013 Reclassified from Other Revenues to Product Revenues [Member] | Mar. 31, 2012 Reclassified from Other Revenues to Product Revenues [Member] | Mar. 31, 2013 Reclassified from Other Revenues to Service Revenues [Member] | Mar. 31, 2012 Reclassified from Other Revenues to Service Revenues [Member] | Mar. 31, 2014 Geographic Concentration Risk [Member] UNITED STATES Sales Revenue, Goods, Net [Member] | Mar. 31, 2014 Geographic Concentration Risk [Member] Other Countries [Member] Sales Revenue, Goods, Net [Member] | Mar. 31, 2014 Sales Revenue, Goods, Net [Member] | Mar. 31, 2013 Sales Revenue, Goods, Net [Member] | Mar. 31, 2012 Sales Revenue, Goods, Net [Member] | Mar. 31, 2014 Accounts Receivable [Member] | Mar. 31, 2014 Trade Names [Member] | Mar. 31, 2013 Trade Names [Member] | Mar. 31, 2014 Maximum [Member] Intangible Assets Excluding Trade Names [Member] | Mar. 31, 2014 Maximum [Member] Trade Names [Member] | Mar. 31, 2014 Minimum [Member] Intangible Assets Excluding Trade Names [Member] | Mar. 31, 2014 Minimum [Member] Trade Names [Member]
Note 1 - Description of Business and Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Reportable Segments | 2 | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Physical Locations in which Entity is Organized |  | 7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock Shares Authorized Prior to Amendment |  |  |  |  | 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  | 25,000,000 | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prior Period Reclassification Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,239,000 | $ 4,805,000 | $ 5,845,000 | $ 4,415,000 |  |  |  |  |  |  |  |  |  |  |  |
Cumulative Prior Period Reclassification Adjustment |  |  |  |  |  |  |  |  | 629,000 | 272,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options |  | $ 1,906,000 | $ 295,000 | $ 62,000 |  |  |  |  |  |  | $ 1,906,000 | $ 295,000 | $ 62,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Major Customers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 0 |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 56.00% | 44.00% |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  | 40 years | 7 years | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years | 10 years | 16 years | 10 years | 3 years | 3 years

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