Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Account receivable, allowances	$ 227	$ 272
Common stock, par value (in dollars per share)	$ 0.02	$ 0.02
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	14,681,284	14,730,805
Common stock, shares outstanding (in shares)	14,681,284	14,730,805