Note O - Supplemental Cash Flow Information (Details Textual) - USD ($)			3 Months Ended
Jun. 30, 2022	Apr. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022
Interest Paid, Excluding Capitalized Interest, Operating Activities			$ 429,000	$ 23,000
Income Taxes Paid, Net, Total			40,000	$ 616,000
Construction in Progress, Gross	$ 19,422,533		$ 19,422,533		$ 15,925,306
Capital Expenditures Incurred but Not yet Paid	$ 7,598,957
Plateplus Inc. [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		516,041	516,041
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 4,800,000	$ 4,783,700

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

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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