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Supplemental Balance Sheet Disclosures (Tables) | 3 Months Ended
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Dec. 31, 2021
Supplemental Balance Sheet Disclosures |
Schedule of inventories | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | September 30,
​ |  | 2021 |  | 2021
Raw materials |  | $ | 3,741,707 |  | $ | 3,729,692
Work-in-process | ​ |  | 678,941 | ​ |  | 629,814
Finished goods | ​ |  | 185,827 | ​ |  | 185,886
​ |  | $ | 4,606,475 |  | $ | 4,545,392
Schedule of prepaid expenses and other current assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | September 30,
​ |  | 2021 |  | 2021
Prepaid insurance |  | $ | 638,385 | ​ | $ | 318,138
Other | ​ |  | 243,093 | ​ |  | 514,938
​ |  | $ | 881,478 | ​ | $ | 833,076
Schedule of property and equipment, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | September 30,
​ |  | 2021 |  | 2021
Computer equipment | ​ | $ | 2,294,387 | ​ | $ | 2,309,053
Corporate airplanes | ​ |  | 5,601,039 | ​ |  | 5,601,039
Furniture and office equipment | ​ |  | 970,725 | ​ |  | 970,725
Manufacturing facility | ​ |  | 5,889,491 | ​ |  | 5,889,491
Equipment | ​ |  | 5,622,877 | ​ |  | 5,545,529
Land | ​ | ​ | 1,021,245 | ​ | ​ | 1,021,245
​ | ​ |  | 21,399,764 | ​ |  | 21,337,082
Less: accumulated depreciation and amortization | ​ |  | (13,268,315) | ​ |  | (13,193,599)
​ |  | $ | 8,131,449 |  | $ | 8,143,483
​
Schedule of other assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | September 30,
​ |  | 2021 |  | 2021
Intangible assets, net of accumulated amortization of $634,032 at December 31, 2021 and September 30, 2021 |  | $ | 62,474 |  | $ | 62,474
Operating lease right-of-use asset | ​ | ​ | 39,336 | ​ | ​ | 42,976
Other non-current assets | ​ | ​ | 79,845 | ​ |  | 82,834
​ |  | $ | 181,655 |  | $ | 188,284
​
Schedule of accrued expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | September 30,
​ |  | 2021 |  | 2021
Warranty |  | $ | 596,436 |  | $ | 589,260
Salary, benefits and payroll taxes | ​ |  | 220,705 | ​ |  | 385,287
Professional fees | ​ |  | 208,680 | ​ |  | 163,130
Operating lease | ​ | ​ | 14,122 | ​ | ​ | 14,296
Other | ​ | ​ | 395,585 | ​ | ​ | 279,142
​ |  | $ | 1,435,528 |  | $ | 1,431,115
​
Schedule of warranty cost and accrual information | ​
​ | ​ | ​ | ​
​ | ​ | Three Months Ending
​ |  | December 31, 2021
Warranty accrual, beginning of period |  | $ | 589,260
Accrued expense | ​ |  | 32,590
Warranty cost | ​ |  | (25,414)
Warranty accrual, end of period |  | $ | 596,436

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