CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Thousands	Apr. 03, 2021	Jan. 02, 2021
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$ 3,789	$ 3,595
Allowance for unbilled services	$ 1,227	$ 1,000
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (shares)	1,000,000	1,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Common stock, par value ( in dollars per share )	$ 0	$ 0
Common stock, shares authorized (shares)	25,000,000	25,000,000
Common stock, shares issued (shares)	7,627,591	7,693,497
Common stock, shares outstanding (shares)	7,627,591	7,693,497