Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Operating Expenses
General and administrative expenses	$ (160)	$ (235)	$ (572)	$ (507)
Total operating expenses	(160)	(235)	(572)	(507)
Interest income	242		317
Income (loss) from continuing operations before income taxes	82	(235)	(255)	(507)
Income tax benefit	(231)		(212)
Income (loss) from continuing operations	313	(235)	(43)	(507)
Discontinued operations
Gain (loss) from discontinued operations (including loss on sale of assets of $865)		247	(3,011)	102
Income tax benefit		(2)		(3)
Loss from discontinued operations		249	(3,011)	105
Net income (loss)	$ 313	$ 14	$ (3,054)	$ (402)
Basic and diluted income (loss) per share:
Income (loss) from continuing operations (in dollars per share)	$ 0.02	$ (0.02)		$ (0.04)
Income (loss) from discontinued operations (in dollars per share)		0.02	(0.21)	0.01
Net income (loss) (in dollars per share)	$ 0.02		$ (0.21)	$ (0.03)
Weighted average shares outstanding:
Basic (in shares)	14,519	14,203	14,551	14,196
Diluted (in shares)	14,519	14,203	14,551	14,196