The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of expense for amortization of capitalized computer software costs.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Finite-Lived Intangible Assets [Line Items]
Capitalized cost	$ 130		$ 130
Amortization of capitalized computer software cost	10		20
Patents
Finite-Lived Intangible Assets [Line Items]
Gross patents value	$ 400		$ 400
Patents useful lives	10 years		10 years
Patents amortization expenses	$ 10	$ 10	$ 20	$ 20
Software
Finite-Lived Intangible Assets [Line Items]
Patents useful lives	3 years		3 years