Description of Business and Summary of Significant Accounting Policies (Long-lived assets by geographic location) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Long-Lived Assets [Line Items]
Total	$ 24,377	$ 19,960
United States
Long-Lived Assets [Line Items]
Total	15,003	14,455
China
Long-Lived Assets [Line Items]
Total	2,931	1,107
South Korea
Long-Lived Assets [Line Items]
Total	$ 6,443	$ 4,398

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

Name:	us-gaap_NoncurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant