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Note 10 - Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($)	Mar. 31, 2019	Sep. 30, 2018
Payroll and related	$ 1,484,278	$ 2,041,735
Contract liability, current	1,202,811
Accrued contract costs	439,068	197,034
Severance		152,730
Warranty reserve	125,175	99,216
Deferred rent	96,264	49,467
Total	3,334,159	3,199,864
Deferred Revenue [Member]
Contract liability, current	456,857	460,086
Customer Deposits [Member]
Contract liability, current	$ 732,517	$ 199,596

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- Definition

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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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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For a classified balance sheet, the cumulative difference as of the balance sheet date between the 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, within one year of the balance sheet date.

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