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Note 3 - Impairment Loss on Goodwill and Long-lived Assets (Details Textual) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2018	Mar. 31, 2018
Goodwill, Ending Balance	$ 64,148	$ 65,543
Intangible Assets, Net (Excluding Goodwill), Total	38,336	$ 42,850
Cold Chain Packaging [Member]
Goodwill, Ending Balance	300
Intangible Assets, Net (Excluding Goodwill), Total	809
Impairment of Long-Lived Assets and Goodwill [Member]
Goodwill, Impairment Loss	1,028
Impairment of Long-Lived Assets Held-for-use	$ 2,641

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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