Stockholders' Equity - Stock Options Roll Forward (Details) - USD ($)		12 Months Ended
	Apr. 01, 2014	Dec. 27, 2020	Dec. 29, 2019
Number of Shares Under Option
Options outstanding at beginning of period, number of options (in shares)		146,000
Granted, number of options (in shares)	0	0
Exercised, number of options (in shares)		(104,000)
Forfeited or expired, number of options (in shares)		0
Options outstanding at end of period, number of options (in shares)		42,000	146,000
Options exercisable at the end of period, number of options (in shares)		42,000
Weighted-Average Exercise Price per Share
Options outstanding at beginning of period, weighted-average exercise price per share (in dollars per share)		$ 4.98
Granted, weighted-average exercise price per share (in dollars per share)		0
Exercised, weighted-average exercise price per share (in dollars per share)		4.98
Forfeited or expired, weighted average exercise price per share (in dollars per share)		0
Options outstanding at end of period, weighted-average exercise price per share(in dollars per share)		4.98	$ 4.98
Options exercisable, weighted average exercise price per share (in dollars per share)		$ 4.98
Weighted- Average Remaining Contractual Term and Aggregate Intrinsic Value
Options outstanding, weighted average remaining contractual term		2 years	3 years
Options exercisable, weighted average remaining contractual term		2 years
Options outstanding, aggregate intrinsic value		$ 897,900	$ 1,866,300
Options exercisable, aggregate intrinsic value		$ 897,900