Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Finance lease right-of-use asset	$ 0		$ 0	$ 13
Property and equipment at cost	1,392		1,392	3,477
Less: accumulated depreciation	(1,316)		(1,316)	(2,802)
Property and equipment, net	76		76	675
Depreciation			159	188
Gain (loss) on disposition of property plant equipment			338	0
Gain (loss) on disposal of fixed assets			$ 334	0
Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			2 years
Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			15 years
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment at cost	1,061		$ 1,061	1,308
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			15 years
Tooling
Property, Plant and Equipment [Line Items]
Property and equipment at cost	190		$ 190	384
Tooling | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			2 years
Tooling | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			5 years
Vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			5 years
Property and equipment at cost	0		$ 0	83
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			5 years
Property and equipment at cost	0		$ 0	86
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			3 years
Property and equipment at cost	0		$ 0	1,194
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment at cost	141		$ 141	169
UV- Robots
Property, Plant and Equipment [Line Items]
Property and equipment, useful life			5 years
Property and equipment at cost	0		$ 0	105
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment at cost	0		$ 0	$ 135
Ultraviolet-C Light Disinfection Robots
Property, Plant and Equipment [Line Items]
Gain (loss) on disposition of property plant equipment	$ 258	$ 76