Condensed Consolidated Balance Sheets (current period unaudited) (Parentheticals) - shares	Jun. 27, 2015	Dec. 27, 2014
Common shares issued (in shares)	22,725,882	22,585,529
Common shares oustanding (in shares)	22,725,882	22,585,529

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant