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Face (par) amount of debt instrument at time of issuance.

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Fixed interest rate related to the interest rate derivative.

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Amount of increase in the fair value of derivatives recognized in the income statement.

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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Note 12 - Financing Arrangements (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
	Sep. 14, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2018
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Total		$ 29,124		$ 29,124
Interest Rate Swap [Member]
Derivative Asset, Total		$ 116,295		116,295
Derivative Liability, Total						$ 66,706
Derivative, Gain on Derivative				145,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Total				$ 29,000
Additional ONB Loan Agreement [Member] \| ONB [Member] \| Term Loan, Two [Member]
Debt Instrument, Face Amount	$ 18,000,000
Additional ONB Loan Agreement [Member] \| ONB [Member] \| Term Loan, Two [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.75%
MBT Credit Agreement [Member] \| MBT [Member] \| Term Loan A [Member] \| Interest Rate Swap [Member]
Derivative, Fixed Interest Rate	4.56%
MBT Credit Agreement [Member] \| MBT [Member] \| Term Loan D [Member] \| Interest Rate Swap [Member]
Derivative, Fixed Interest Rate	5.09%