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Note 9 - Accrued Liabilities - Summary of Accrued Liabilities (Details) - USD ($)
Mar. 31, 2018
Sep. 30, 2017
Payroll and related $ 1,214,039 $ 1,870,579
Deferred revenue 1,028,497 268,580
Accrued contract costs 474,068 197,034
Severance 327,937
Business Combination, Contingent Consideration, Liability, Current 185,250
Warranty reserve 169,204 179,101
Deferred rent 15,367 46,101
Total $ 3,414,362 $ 2,561,395