3. Operating Lease: Balance sheet information related to lease (Details) - USD ($) $ in Thousands	Mar. 29, 2019	Dec. 31, 2018
Notes to Financial Statements
Operating lease right-of-use asset	$ 49	$ 187
Operating lease liability, current portion	$ 49	$ 188

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

Name:	us-gaap_OperatingLeaseLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant