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Note 8 - Loss Per Common Share - Reconciliation of Weighted Average Shares Outstanding Used in Calculation of Basic and Diluted (Loss) Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Net loss	$ (2,305)	$ (1,795)	$ (1,795)
Less distributed and undistributed earnings allocable to restricted awarded holders	0	0
Less dividends declared attributed to restricted awarded holders	0	0
Net loss allocable to common stockholders	$ (2,305)	$ (1,795)
Basic (in dollars per share)	$ (0.11)	$ (0.09)
Diluted (in dollars per share)	$ (0.11)	$ (0.09)
Basic (in shares)	20,669	20,394
Weighted average additional shares assuming conversion of potential common shares (in shares)	0	0
Weighted average shares outstanding – diluted (in shares)	20,669	20,394

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The total amount of dividends declared in the period for each class of stock and the contractual amount of dividends (or interest on participating income bonds) that must be paid for the period (for example, unpaid cumulative dividends). Dividends declared in the current period do not include dividends declared in respect of prior-period unpaid cumulative dividends. Preferred dividends that are cumulative only if earned are deducted only to the extent that they are earned.

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