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10. Stock-Based Compensation (Details 4) - USD ($) $ in Thousands	Dec. 31, 2018	Aug. 22, 2018
SARs liability	$ 1,132	$ 1,277
Level 1
SARs liability	0
Level 2
SARs liability	0
Level 3
SARs liability	$ 1,132

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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