Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common shares	Capital in excess of par	Retained earnings	Treasury shares	Total
Balance at Jan. 03, 2015	$ 643	$ 1,827	$ 60,070	$ 15,718
Balance (in shares) at Jan. 03, 2015	2,574,264			924,097
Consolidated Statements of Shareholders' Equity
Net income			1,413		$ 1,413
Compensation of Board of Directors by issuance of treasury shares		(10)		$ (207)
Compensation of Board of Directors by issuance of treasury shares (in shares)				(12,000)
Purchase of treasury shares				$ 16
Purchase of treasury shares (in shares)				1,000	(1,000)
Balance at Jan. 02, 2016	$ 643	1,817	61,483	$ 15,527	$ 48,416
Balance (in shares) at Jan. 02, 2016	2,574,264			913,097
Consolidated Statements of Shareholders' Equity
Net income			3,686		$ 3,686
Compensation of Board of Directors by issuance of treasury shares		(52)		$ (204)
Compensation of Board of Directors by issuance of treasury shares (in shares)				(12,000)
Purchase of treasury shares				$ 50
Purchase of treasury shares (in shares)				2,000	(2,000)
Balance at Dec. 31, 2016	$ 643	$ 1,765	$ 65,169	$ 15,373	$ 52,204
Balance (in shares) at Dec. 31, 2016	2,574,264			903,097