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Note 2 - Acquisitions and Dispositions (Details) - Adjusted Pro Forma Effect of the Acquisitions on the Results of Operations (Bios International Corporation [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Bios International Corporation [Member]
Note 2 - Acquisitions and Dispositions (Details) - Adjusted Pro Forma Effect of the Acquisitions on the Results of Operations [Line Items]
Revenues	$ 47,216	$ 46,498
Net income	$ 8,471	$ 8,102
Basic	$ 2.52	$ 2.47
Diluted	$ 2.36	$ 2.34

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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