Leases (Narrative) (Details) - Warren, New Jersey [Member] $ in Thousands	Jul. 02, 2019 USD ($) ft²
Lease [Line Items]
Area of property \| ft²	315,000
Annual lease expense	$ 7,800
Monthly lease expense	$ 650
Lease expiration, year	2036

Amount of operating lease expense. Excludes sublease income.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977

Name:	us-gaap_OperatingLeaseExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration