Segment Information (Details 3) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Major Customer Disclosure
Revenue	$ 63,989	$ 48,384
USA
Major Customer Disclosure
Revenue	34,788	34,239
Taiwan
Major Customer Disclosure
Revenue	7,064	2,101
South Korea
Major Customer Disclosure
Revenue	1,820	1,281
Japan
Major Customer Disclosure
Revenue	2,843	2,619
Europe
Major Customer Disclosure
Revenue	738	3,375
Canada
Major Customer Disclosure
Revenue	512	1,058
Singapore
Major Customer Disclosure
Revenue	7,630	1,884
Asia-Other
Major Customer Disclosure
Revenue	$ 8,594	$ 1,827

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Name:	us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration