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Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill and Intangible Assets
Goodwill, Impairment Loss				$ 0	$ 675
Amortization of Intangible Assets				725	745
DDS [Member]
Goodwill and Intangible Assets
Goodwill, Impairment Loss			$ 675		675
Intangible Assets, Amortization Period [Member]
Goodwill and Intangible Assets
Amortization of Intangible Assets	$ 200	$ 200		$ 700	$ 700

X

- Definition

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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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.

+ References

No definition available.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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