Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 25, 2016	Jun. 27, 2015	Jun. 25, 2016	Jun. 27, 2015
Income Statement [Abstract]
Operating revenues	$ 13,842	$ 21,053	$ 28,654	$ 44,155
Operating costs	11,989	16,444	25,128	35,424
Gross profit	1,853	4,609	3,526	8,731
Selling, general and administrative expenses	3,313	3,555	6,703	7,559
Operating income (loss)	(1,460)	1,054	(3,177)	1,172
Other income (expense):
Other income (expense), net	1	26	7	645
Interest expense, net	(49)	(44)	(85)	(66)
Income (loss) from operations before income taxes	(1,508)	1,036	(3,255)	1,751
Provision (benefit) for federal and state income taxes	95	60	(903)	152
Net income (loss)	$ (1,603)	$ 976	$ (2,352)	$ 1,599
Basic and diluted income (loss) per common share:	$ (0.06)	$ 0.03	$ (0.08)	$ 0.06
Basic and diluted weighted average shares used in computing earnings per share:	27,831	28,017	27,884	27,950

The aggregate direct operating costs incurred during the reporting period.

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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.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The net amount of operating interest income (expense).

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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