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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 |  |

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- 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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