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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Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Oct. 31, 2012	Mar. 31, 2021	Mar. 31, 2020
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets		$ 303	$ 222
Acquisition of Lygo International Limited \| Customer Relationships
Finite Lived Intangible Assets [Line Items]
Useful life	13 years