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Revenue Recognition, Adoption of ASC Topic 606 (Details) - USD ($)	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2016
Revenue Recognition [Abstract]
Retained earnings	$ 71,407,000	$ 78,510,000
Adoption of ASC 606 [Member] | ASU 2014-09 [Member]
Revenue Recognition [Abstract]
Retained earnings		$ 742,000	$ 345,000

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(3))
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