Nature of Business, Basis of Presentation and Significant Accounting Policies - Textual (Details) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 29, 2018 USD ($) PerformanceObligation Customer shares	Dec. 30, 2017 USD ($) Customer shares	Dec. 31, 2016 USD ($) Customer shares
Accounting Policies [Line Items]
Fiscal year duration	364 days	364 days	371 days
Foreign currency transaction losses	$ (1.1)	$ (0.6)	$ (0.4)
Minimum required performance obligation for contracts | PerformanceObligation	1
Maximum period of delivery to customers	6 months
Maximum period services are provided over the fixed arrangement term	12 months
Revenue recognized during the period	$ 5.2
Product warranty period	12 months
Potential dilutive common stock equivalents, using treasury stock method | shares	480	585	498
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]
Accounting Policies [Line Items]
Number of Major Customer | Customer	5	5	5
Concentration of risk percentage	70.00%	73.00%	73.00%
Stock Options [Member]
Accounting Policies [Line Items]
Potential dilutive common stock equivalents, using treasury stock method | shares	500	600	500
Accounts Receivable [Member]
Accounting Policies [Line Items]
Contract assets balance	$ 2.2	$ 4.3
Minimum [Member]
Accounting Policies [Line Items]
Performance obligations payment term.	30 days
Maximum [Member]
Accounting Policies [Line Items]
Performance obligations payment term.	60 days