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Note 8 - Restricted Stock - Non-vested Restricted Stock (Details) shares in Thousands	12 Months Ended
	Mar. 31, 2020 shares
Non-vested restricted stock outstanding at March 31, 2019 (in shares)	150
Restricted stock granted (in shares)	115
Restricted stock vested (in shares)	(73)
Restricted stock forfeited or expired (in shares)	(9)
Non-vested restricted stock outstanding at March 31, 2020 (in shares)	183
Employee Plan [Member]
Non-vested restricted stock outstanding at March 31, 2019 (in shares)	82
Restricted stock granted (in shares)	77
Restricted stock vested (in shares)	(41)
Restricted stock forfeited or expired (in shares)	(9)
Non-vested restricted stock outstanding at March 31, 2020 (in shares)	109
Director Plan [Member]
Non-vested restricted stock outstanding at March 31, 2019 (in shares)	68
Restricted stock granted (in shares)	38
Restricted stock vested (in shares)	(32)
Restricted stock forfeited or expired (in shares)
Non-vested restricted stock outstanding at March 31, 2020 (in shares)	74

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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