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v3.22.1

Revenue Recognition - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Mar. 31, 2022 | Mar. 31, 2021 | Sep. 30, 2021
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |
Unbilled receivables |  |  |  |  |  |  |  |  |  | $ 1,051,000
Deferred contract liabilities | $ 0 |  |  |  |  |  |  | $ 0 |  | 0
Revenue | 21,565,000 |  |  | $ 21,604,000 |  |  |  | 34,597,000 | $ 48,326,000 |
Cost of revenue | 17,890,000 |  |  | 23,045,000 |  |  |  | 34,179,000 | 44,780,000 |
Value of notes with customer | 16,106,000 |  |  |  |  |  |  | 16,106,000 |  | $ 7,896,000
Secured Promissory Note |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |
Value of notes with customer | $ 8,000,000.0 | $ 3,700,000 |  |  |  |  | $ 10,000,000.0 | 8,000,000.0 |  |
Term of the notes | 1 year | 9 months | 6 months |  |  |  | 3 years |  |  |
Monthly principal and interest payments |  |  |  |  |  |  | $ 300,000 |  |  |
Frequency of payments |  |  |  |  |  |  | monthly |  |  |
Product |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  | $ 0 |  |  | 12,500,000 |  |
Cost of revenue |  |  |  |  | $ 0 |  |  |  |  |
Partially financed product sale |  |  |  |  |  |  | $ 12,500,000 |  |  |
Payments received from customer |  |  |  |  |  |  |  | 8,100,000 |  |
Deferred Contract Liability |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue | $ 0 |  |  | 0 |  |  |  | 0 | 0 |
Cost of revenue | 0 |  |  | $ 0 |  |  |  | 0 | 0 |
U.S. Customs and Border Protection ("CBP") |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |
Awarded contract amount |  |  |  |  |  | $ 10,500,000 |  |  |  |
Increase in contract amount |  |  |  |  |  | $ 300,000 |  |  |  |
Revenue recognized under the contract |  |  |  |  |  |  |  | 400,000 | $ 8,900,000 |
Revenue for unsatisfied performance obligations | $ 0 |  |  |  |  |  |  | $ 0 |  |

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