CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 29, 2019	Mar. 30, 2018
Text Block [Abstract]
Sales	$ 7,165	$ 7,581
Cost of sales	(4,961)	(4,972)
Gross profit	2,204	2,609
Operating expenses:
Selling, general and administrative	(1,817)	(1,773)
Research and development	(902)	(767)
Pension	(57)	(54)
Total operating expenses	(2,776)	(2,594)
Operating income (loss)	(572)	15
Other expense, net	(71)	(75)
Loss before income tax provision	(643)	(60)
Income tax provision	0	(11)
Net loss	$ (643)	$ (71)
Net loss per common share - basic and diluted	$ (0.06)	$ (0.01)
Weighted average common shares outstanding - basic and diluted	11,406	11,353

The aggregate cost of goods produced and sold and services rendered during the reporting period.

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

- Definition

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256