Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
Jun. 29, 2019	Jun. 30, 2018
Statement of Cash Flows [Abstract]
Cash provided by (used in) operating activities, net	$ 364	$ (867)
Cash used in investing activities, net	(29)
Cash used in financing activities, net		(10)
Net increase (decrease) in cash and cash equivalents	335	(877)
Cash and cash equivalents at beginning of period	558	1,414
Cash and cash equivalents at end of period	893	537
Supplemental cash flow information:
Income taxes paid	6	5
Interest paid	13	13
Operating cash flows:
Cash paid for the amounts in the measurement of operating lease liability	49
Right of use assets obtained in exchange for the operating lease liability	$ 362

Cash paid for amounts in the measurement of the operating lease liability.

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Operating cash flows supplemental information abstract.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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