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Note 8 - Goodwill and Long-lived Assets (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Oct. 31, 2019
Asset Impairment Charges, Total	$ 298,000	$ 4,774,000	$ 13,819,000
Goodwill, Impairment Loss	258,000	1,075,000
Amortization of Intangible Assets, Total	10,637,000	7,090,000	$ 6,929,000
GPT Acquisition [Member]
Amortization of Intangible Assets, Total	9,774,000	9,774,000
GPT Acquisition [Member] | Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets				$ 2,321,000
Impairment of Long-Lived Assets and Goodwill [Member]
Asset Impairment Charges, Total	$ 296,000
Goodwill, Impairment Loss		1,075,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		3,378,000
Impairment of Long-Lived Assets Held-for-use		$ 229,000

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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