Stock-Based Compensation - Schedule of non-vested stock option activity (Details) - Stock Options [Member] - $ / shares	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Non-vested, beginning of year	1,433,648
Granted	12,400
Vested	(441,034)
Forfeited	(425,314)
Non-vested, end of year	579,700	1,433,648
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Non-vested, beginning of year	$ 3.74
Granted	1.70	$ 3.31	$ 4.12
Vested	3.08
Forfeited	3.84
Non-vested, end of year	$ 4.14	$ 3.74