Note 6 - Accrued Expenses (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Salaries, wages and related items	$ 1,571,347us-gaap_AccruedSalariesCurrent	$ 1,448,502us-gaap_AccruedSalariesCurrent
Profit sharing	1,088,089	501,831
Health insurance	405,826us-gaap_AccruedInsuranceCurrent	280,554us-gaap_AccruedInsuranceCurrent
Warranty reserves	231,803	242,064
Other	232,386us-gaap_OtherAccruedLiabilitiesCurrent	119,583us-gaap_OtherAccruedLiabilitiesCurrent
Total	$ 3,529,451us-gaap_AccruedLiabilitiesCurrent	$ 2,592,534us-gaap_AccruedLiabilitiesCurrent

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).

+ References+ Details

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).

+ References+ Details

- 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).

+ References+ Details

- 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).

+ References+ Details