Common Stock, Average Cost Per Share

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- Definition

Common Stock, Decrease In Average Cost Per Share, Percentage

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- Definition

Goodwill, Decrease In Stock Price, Estimated Impairment Loss

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- Definition

Goodwill, Measurement Input

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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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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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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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- Definition

Percentage of fair value of reporting unit in excess of carrying amount.

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Balance Sheet Components (Goodwill Impairment Narrative) (Details)			3 Months Ended	9 Months Ended	12 Months Ended
	Feb. 07, 2019 USD ($)	Feb. 05, 2019 $ / shares	Sep. 29, 2019 USD ($)	Sep. 29, 2019 segment	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Average cost per share (in usd per share) \| $ / shares		$ 3.71
Decrease in average cost per share (as a percentage)		223.30%
Number of operating segments \| segment				1
Number of reportable segments \| segment				1
Fair value in excess of carrying amount (as a percentage)	29.80%
Decrease in stock price, estimated impairment loss \| $	$ 15,600,000
Goodwill impairment \| $			$ 0		$ 0
MPAP
Goodwill [Line Items]
Market participant acquisition premium	0.25
Fair value in excess of carrying amount (as a percentage)	27.20%
MPAP - Adjustment
Goodwill [Line Items]
Market participant acquisition premium	2.50