Note 6 - Accrued Expenses (Details) - Accrued Expenses (USD $)	Mar. 31, 2014	Mar. 31, 2013
Accrued Expenses [Abstract]
Salaries, wages and related items	$ 1,448,502	$ 1,272,183
Profit sharing	501,831	384,999
Health insurance	280,554	149,403
Warranty reserves	242,064	208,745
Other	119,583	104,670
Total	$ 2,592,534	$ 2,120,000

Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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