Consolidated Statements of Shareholders’ Equity - USD ($) $ in Thousands	Common shares	Capital in excess of par	Retained earnings	Treasury shares	Total
Balance at Dec. 30, 2017	$ 643	$ 1,887	$ 66,987	$ 15,195
Balance (in shares) at Dec. 30, 2017	2,574,264			892,097
Consolidated Statements of Shareholders' Equity
Net loss			(5,856)		$ (5,856)
Compensation of Board of Directors by issuance of treasury shares		43		$ (272)
Compensation of Board of Directors by issuance of treasury shares (in shares)				(16,000)
Purchase of treasury shares				$ 5
Purchase of treasury shares (in shares)				312
Balance at Dec. 29, 2018	$ 643	1,930	61,131	$ 14,928	48,776
Balance (in shares) at Dec. 29, 2018	2,574,264			876,409
Consolidated Statements of Shareholders' Equity
Net loss			(13,899)		(13,899)
Compensation of Board of Directors by issuance of treasury shares		(77)		$ (645)
Compensation of Board of Directors by issuance of treasury shares (in shares)				(37,998)
Purchase of treasury shares				$ 256
Purchase of treasury shares (in shares)				22,499
Balance at Dec. 28, 2019	$ 643	$ 1,853	$ 47,232	$ 14,539	$ 35,189
Balance (in shares) at Dec. 28, 2019	2,574,264			860,910