Option Activity and Changes (Detail) - USD ($)	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015
Shares
Options outstanding at January 3, 2015	2,584,935
Options granted	447,625
Options cancelled and forfeited	(544,423)
Options exercised	(54,490)
Options outstanding at January 2, 2016	2,433,647	2,584,935
Vested and expected to vest at January 2, 2016	2,300,981
Options exercisable at January 2, 2016	1,415,758
Weighted Average Exercise Price
Options outstanding at January 3, 2015	$ 8.26
Options granted	5.51
Options cancelled and forfeited	9.67
Options exercised	4.40
Options outstanding at January 2, 2016	7.52	$ 8.26
Vested and expected to vest at January 2, 2016	7.60
Options exercisable at January 2, 2016	$ 8.55
Weighted Average Remaining Contractual Term
Options outstanding	4 years 1 month 6 days	4 years 1 month 24 days
Vested and expected to vest at January 2, 2016	4 years 4 days
Options exercisable at January 2, 2016	3 years 2 months 1 day
Aggregate Intrinsic Value
Options outstanding at January 3, 2015	$ 1,895,817
Options outstanding at January 2, 2016	141,546	$ 1,895,817
Vested and expected to vest at January 2, 2016	138,643
Options exercisable at January 2, 2016	$ 112,363