Note 5 - Accrued Expenses (Detail) - Accrued expenses consisted of the following: (USD $)	Mar. 31, 2013	Mar. 31, 2012
Salaries, wages and related items	$ 1,272,183	$ 1,188,016
Profit sharing	384,999	262,599
Health insurance	149,403	191,397
Warranty reserves	208,745	253,225
Other	104,670	71,602
Total	$ 2,120,000	$ 1,966,839