Note 12 - Computation of Earnings Per Share (Details Textual) - $ / shares	12 Months Ended
Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Weighted Average Number Diluted Shares Outstanding Adjustment	704,000	802,000	708,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	2,945,238	1,943,420	2,357,772
Antidilutive Securities Excluded from Computation of Earnings Per Share, Weighted Average Exercise Price	$ 11.79	$ 12.02	$ 12.24

Weighted average exercise price for securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share or unit amounts for the period presented.

No definition available.

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Period Type:	duration

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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