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Number of shares of equity interests issued or issuable to acquire entity.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Face amount or stated value per share of common stock.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

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

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Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	May 06, 2021	Mar. 31, 2022	Mar. 31, 2021	May 29, 2020
Retained Earnings (Accumulated Deficit), Total		$ (1,020,506)	$ (1,001,313)
Cash and Cash Equivalents, at Carrying Value, Total		40,584	67,814
Net Cash Provided by (Used in) Operating Activities, Total		(18,977)	(8,681)
Payments to Acquire Businesses, Gross		$ 11,479	$ 26,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	$ 4,400
AMSC Husky LLC [Member]
Payments to Acquire Real Estate, Total	4,300
Inox Wind Limited [Member]
Supply Commitment, Default, Letters of Credit to be Received				$ 250,000
TD Bank [Member] \| AMSC Husky LLC [Member]
Payments to Acquire Real Estate, Total	1,900
Neeltran Inc. Sellling Stockholders [Member] \| Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	$ 1,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	301,556
Capanna, Sr. and Capanna, Jr. [Member] \| Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	$ 1,100
Neeltran Third Party Lenders [Member] \| Neeltran Inc. [Member]
Payments to Acquire Businesses, Gross	7,600
Neeltran Third Party Lenders [Member] \| Neeltran Inc. [Member] \| Indebtedness Secured by Mortgage on Real Property [Member]
Payments to Acquire Businesses, Gross	$ 1,900