Revenue Recognition - Additional Information (Details) - USD ($)	3 Months Ended							6 Months Ended	9 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2022	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Deferred contract liabilities	$ 0								$ 0		$ 0
Outstanding promissory note	3,800,000								3,800,000
Revenue	13,463,000			$ 17,679,000					48,060,000	$ 66,005,000
Cost of revenue	17,040,000			$ 17,456,000					51,219,000	62,236,000
Value of notes with customer	14,416,000								14,416,000		$ 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									8,700,000
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									$ 300,000	$ 9,900,000