Stockholders' Equity - Stock Options Roll Forward (Details) - USD ($)		12 Months Ended
	Apr. 01, 2014	Dec. 30, 2018	Dec. 31, 2017
Number of Shares Under Option
Options outstanding at beginning of period, Number of Options (in shares)		899,000
Granted, Number of Options (in shares)	0	5,000
Exercised, Number of Options (in shares)		(10,000)
Forfeited or expired, Number of Options (in shares)		(126,000)
Options outstanding at end of period, Number of Options (in shares)		768,000	899,000
Options exercisable, Number of Options (in shares)		767,000
Weighted-Average Exercise Price per Share
Options outstanding at beginning of period, Weighted-Average Exercise Price per Share (in dollars per share)		$ 7.82
Granted, Weighted-Average Exercise Price per Share (in dollars per share)		11.78
Exercised, Weighted-Average Exercise Price per Share (in dollars per share)		8.71
Forfeited or expired, Weighted-Average Exercise Price per Share (in dollars per share)		24.01
Options outstanding at end of period, Weighted-Average Exercise Price per Share (in dollars per share)		5.17	$ 7.82
Options exercisable, Weighted-Average Exercise Price per Share (in dollars per share)		$ 5.16
Weighted- Average Remaining Contractual Term and Aggregate Intrinsic Value
Options outstanding, Weighted Average Remaining Contractual Term		4 years 2 months 12 days	4 years 4 months 24 days
Options exercisable, Weighted-Average Remaining Contractual Term		4 years 1 month 6 days
Options outstanding, Aggregate Intrinsic Value		$ 6,587,500	$ 4,224,800
Options exercisable, Aggregate Intrinsic Value		$ 6,586,500