Stockholders' Equity (Details 1) (USD $)	12 Months Ended
	Jan. 03, 2015
Range One
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 0.90
Range of Exercise Prices, Upper Range Limit	$ 3.07
Options Outstanding, Number of Shares	96,025
Options Outstanding, Weighted Average Remaining Contractual Life (years)	1 year 1 month 13 days
Options Outstanding, Weighted Average Exercise Price	$ 1.70
Options Vested and Exercisable, Number of Shares Exercisable	96,025
Options Vested and Exercisable, Weighted Average Exercise Price	$ 1.70
Range Two
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 3.08
Range of Exercise Prices, Upper Range Limit	$ 3.60
Options Outstanding, Number of Shares	91,707
Options Outstanding, Weighted Average Remaining Contractual Life (years)	3 years 2 months 1 day
Options Outstanding, Weighted Average Exercise Price	$ 3.51
Options Vested and Exercisable, Number of Shares Exercisable	72,064
Options Vested and Exercisable, Weighted Average Exercise Price	$ 3.49
Range Three
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 3.72
Range of Exercise Prices, Upper Range Limit	$ 3.75
Options Outstanding, Number of Shares	33,250
Options Outstanding, Weighted Average Remaining Contractual Life (years)	3 years 9 months 29 days
Options Outstanding, Weighted Average Exercise Price	$ 3.72
Options Vested and Exercisable, Number of Shares Exercisable	22,000
Options Vested and Exercisable, Weighted Average Exercise Price	$ 3.73
Range Four
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 3.86
Range of Exercise Prices, Upper Range Limit	$ 3.86
Options Outstanding, Number of Shares	147,896
Options Outstanding, Weighted Average Remaining Contractual Life (years)	4 years 10 months 28 days
Options Outstanding, Weighted Average Exercise Price	$ 3.86
Options Vested and Exercisable, Number of Shares Exercisable	59,646
Options Vested and Exercisable, Weighted Average Exercise Price	$ 3.86
Range Five
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 3.89
Range of Exercise Prices, Upper Range Limit	$ 4.31
Options Outstanding, Number of Shares	140,325
Options Outstanding, Weighted Average Remaining Contractual Life (years)	3 years 1 month 13 days
Options Outstanding, Weighted Average Exercise Price	$ 4.12
Options Vested and Exercisable, Number of Shares Exercisable	112,521
Options Vested and Exercisable, Weighted Average Exercise Price	$ 4.15
Range Six
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 4.70
Range of Exercise Prices, Upper Range Limit	$ 5.92
Options Outstanding, Number of Shares	137,463
Options Outstanding, Weighted Average Remaining Contractual Life (years)	4 years 6 months 15 days
Options Outstanding, Weighted Average Exercise Price	$ 5.50
Options Vested and Exercisable, Number of Shares Exercisable	64,546
Options Vested and Exercisable, Weighted Average Exercise Price	$ 5.45
Range Seven
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 6.0
Range of Exercise Prices, Upper Range Limit	$ 8.58
Options Outstanding, Number of Shares	122,129
Options Outstanding, Weighted Average Remaining Contractual Life (years)	5 years 11 months 1 day
Options Outstanding, Weighted Average Exercise Price	$ 7.91
Options Vested and Exercisable, Number of Shares Exercisable	25,131
Options Vested and Exercisable, Weighted Average Exercise Price	$ 7.45
Range Eight
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 8.60
Range of Exercise Prices, Upper Range Limit	$ 8.98
Options Outstanding, Number of Shares	42,000
Options Outstanding, Weighted Average Remaining Contractual Life (years)	6 years 6 months 18 days
Options Outstanding, Weighted Average Exercise Price	$ 8.84
Range Nine
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 9.34
Range of Exercise Prices, Upper Range Limit	$ 9.34
Options Outstanding, Number of Shares	20,000
Options Outstanding, Weighted Average Remaining Contractual Life (years)	6 years 2 months 5 days
Options Outstanding, Weighted Average Exercise Price	$ 9.34
Range Ten
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 10.19
Range of Exercise Prices, Upper Range Limit	$ 10.19
Options Outstanding, Number of Shares	3,000
Options Outstanding, Weighted Average Remaining Contractual Life (years)	5 years 11 months 1 day
Options Outstanding, Weighted Average Exercise Price	$ 10.19
Options Vested and Exercisable, Number of Shares Exercisable	813
Options Vested and Exercisable, Weighted Average Exercise Price	$ 10.19
Range Eleven
Stock options outstanding and exercisable
Range of Exercise Prices, Lower Range Limit	$ 0.90
Range of Exercise Prices, Upper Range Limit	$ 10.19
Options Outstanding, Number of Shares	833,795
Options Outstanding, Weighted Average Remaining Contractual Life (years)	4 years 1 month 21 days
Options Outstanding, Weighted Average Exercise Price	$ 4.88
Options Vested and Exercisable, Number of Shares Exercisable	452,746
Options Vested and Exercisable, Weighted Average Exercise Price	$ 3.85