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Note 2 - Acquisitions - Purchase Price (Details) - USD ($) $ in Thousands				6 Months Ended
	May 06, 2021	Mar. 31, 2021	Oct. 01, 2020	Sep. 30, 2022	Sep. 30, 2021
Cash or Debt payment				$ (0)	$ 11,479
Neeltran Inc. [Member]
Cash or Debt payment	$ 4,400
Total consideration	16,400
Neeltran Inc. [Member] | Neeltran Inc. Sellling Stockholders [Member]
Cash or Debt payment	1,000
Issuance of 301,556 shares of Company's common stock	4,400
Issuance of 873,657 shares of Company’s common stock	4,400
Neeltran Inc. [Member] | Neeltran Third Party Lenders [Member]
Cash or Debt payment	$ 7,600
Northeast Power Systems, Inc (NEPSI) [Member]
Cash or Debt payment		$ 26,000	$ 26,000
Issuance of 301,556 shares of Company's common stock		12,400
Total consideration		42,400	$ 42,400
Issuance of 873,657 shares of Company’s common stock		12,400
Contingent consideration		$ 4,000

X

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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