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Subsequent Events (Details) - Subsequent Event [Member] $ in Thousands	1 Months Ended
	Feb. 28, 2019 USD ($) shares
Subsequent Event [Line Items]
Share issued	1,700,000
Share issued, value | $	$ 16,150
Number of share sales	6,117,440
Percentage of number of shares held	24.00%
Chroma [Member]
Subsequent Event [Line Items]
Percentage of number of shares held	20.50%

X

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Number of new stock issued during the period.

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- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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