Stock-Based Compensation (Schedule of Options Outstanding and Options Exercisable) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 0.78
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 5.94
Number of options outstanding (in shares)	5,682
Weighted average remaining contractual life (in years)	5 years 5 months 19 days
Weighted average exercise price (in dollars per share)	$ 2.67
Options vested and exercisable (in shares)	4,554
Weighted average exercise price (in dollars per share)	$ 2.56
Exercise Price $0.78 - $0.90 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 0.78
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 0.90
Number of options outstanding (in shares)	516
Weighted average remaining contractual life (in years)	3 years 9 months 26 days
Weighted average exercise price (in dollars per share)	$ 0.90
Options vested and exercisable (in shares)	516
Weighted average exercise price (in dollars per share)	$ 0.90
Exercise Price $1.63 - 1.63 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 1.63
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 1.63
Number of options outstanding (in shares)	895
Weighted average remaining contractual life (in years)	4 years 2 months 9 days
Weighted average exercise price (in dollars per share)	$ 1.63
Options vested and exercisable (in shares)	895
Weighted average exercise price (in dollars per share)	$ 1.63
Exercise Price $2.16 - $2.76 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 2.16
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 2.76
Number of options outstanding (in shares)	571
Weighted average remaining contractual life (in years)	6 years 11 months 16 days
Weighted average exercise price (in dollars per share)	$ 2.29
Options vested and exercisable (in shares)	349
Weighted average exercise price (in dollars per share)	$ 2.31
Exercise Price $2.78 - 2.78 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 2.78
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 2.78
Number of options outstanding (in shares)	1,596
Weighted average remaining contractual life (in years)	5 years 10 months 21 days
Weighted average exercise price (in dollars per share)	$ 2.78
Options vested and exercisable (in shares)	1,454
Weighted average exercise price (in dollars per share)	$ 2.78
Exercise Price $2.82- 3.20 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 2.82
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 3.20
Number of options outstanding (in shares)	633
Weighted average remaining contractual life (in years)	5 years 2 months 9 days
Weighted average exercise price (in dollars per share)	$ 3.03
Options vested and exercisable (in shares)	399
Weighted average exercise price (in dollars per share)	$ 2.94
Exercise Price $3.21- 3.48 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 3.21
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 3.48
Number of options outstanding (in shares)	727
Weighted average remaining contractual life (in years)	7 years 11 months 9 days
Weighted average exercise price (in dollars per share)	$ 3.40
Options vested and exercisable (in shares)	325
Weighted average exercise price (in dollars per share)	$ 3.41
Exercise Price $3.54- 3.92 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 3.54
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 3.92
Number of options outstanding (in shares)	167
Weighted average remaining contractual life (in years)	8 years 8 months 12 days
Weighted average exercise price (in dollars per share)	$ 3.69
Options vested and exercisable (in shares)	39
Weighted average exercise price (in dollars per share)	$ 3.64
Exercise Price $4.17 - 4.17 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 4.17
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 4.17
Number of options outstanding (in shares)	504
Weighted average remaining contractual life (in years)	2 years 10 months 10 days
Weighted average exercise price (in dollars per share)	$ 4.17
Options vested and exercisable (in shares)	504
Weighted average exercise price (in dollars per share)	$ 4.17
Exercise Price $4.36 - 4.36 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 4.36
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 4.36
Number of options outstanding (in shares)	35
Weighted average remaining contractual life (in years)	5 months 1 day
Weighted average exercise price (in dollars per share)	$ 4.36
Options vested and exercisable (in shares)	35
Weighted average exercise price (in dollars per share)	$ 4.36
Exercise Price $5.94 - 5.94 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, options outstanding, minimum (in dollars per share)	$ 5.94
Range of exercise price, options outstanding, maximum (in dollars per share)	$ 5.94
Number of options outstanding (in shares)	38
Weighted average remaining contractual life (in years)	1 year 1 month 21 days
Weighted average exercise price (in dollars per share)	$ 5.94
Options vested and exercisable (in shares)	38
Weighted average exercise price (in dollars per share)	$ 5.94