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Note 10 - Accrued Liabilities and Other Liabilities - Noncurrent - Other Noncurrent Liabilities (Details) - USD ($)
Mar. 31, 2020
Sep. 30, 2019
Deferred rent $ 1,881,387
Deferred extended warranty revenue 435,880  
Total 435,880 2,432,272
Deferred Revenue [Member]    
Deferred extended warranty revenue $ 435,880 $ 550,885