CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Net of allowances of trade, note and other accounts receivable	$ 0	$ 0
Net of amortization of intangible assets	$ 6,129	$ 5,275
Undesignated preferred stock, par value	$ 0.001	$ 0.001
Undesignated preferred stock, shares authorized	10,000,000	10,000,000
Undesignated preferred stock, shares issued	0	0
Undesignated preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	20,939,000	20,372,000
Common stock, shares outstanding	20,939,000	20,372,000
Treasury stock, shares	4,845,000	4,845,000