Note 7 - Summary of Accrued Liabilities (Details) - USD ($)	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015
Payroll and related		$ 969,724	$ 330,916
Deferred revenue		795,532	51,345
Short-term warranty reserve	$ 289,660	$ 253,801	289,660
Accrued contract costs			197,034
Other			1,600
Total		$ 2,019,057	870,555
Deferred rent		110,078	121,996
Long-term warranty reserve	$ 25,958	64,021	25,958
Total		$ 174,099	$ 147,954

Represents accrued contract costs.

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. 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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For a classified balance sheet, the cumulative difference between the rental income or payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, more than one year after the balance sheet date.

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. 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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Amount at end of the reporting period of the aggregate extended product warranty liability that is expected to be paid after one year from the balance sheet date or normal operating cycle, if longer. Does not include the balance for the standard product warranty liability.

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