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Revenue Recognition - Disaggregated Revenue from External Customers by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 27, 2021	Mar. 28, 2021	Dec. 27, 2020	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 27, 2021	Jun. 28, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue, net	$ 145.8	$ 137.3	$ 127.0	$ 115.5	$ 108.4	$ 113.9	$ 120.7	$ 127.7	$ 525.6	$ 470.7	$ 538.2
Europe
Disaggregation of Revenue [Line Items]
Revenue, net									$ 188.9	$ 171.4	$ 162.9
Europe | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue									36.00%	36.00%	30.00%
United States
Disaggregation of Revenue [Line Items]
Revenue, net									$ 117.3	$ 106.5	$ 122.0
United States | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue									22.00%	23.00%	23.00%
China
Disaggregation of Revenue [Line Items]
Revenue, net									$ 100.1	$ 65.0	$ 116.3
China | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue									19.00%	14.00%	22.00%
Japan
Disaggregation of Revenue [Line Items]
Revenue, net									$ 42.5	$ 52.1	$ 68.7
Japan | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue									8.00%	11.00%	13.00%
South Korea
Disaggregation of Revenue [Line Items]
Revenue, net									$ 32.1	$ 47.7	$ 32.5
South Korea | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue									6.00%	10.00%	6.00%
Other
Disaggregation of Revenue [Line Items]
Revenue, net									$ 44.7	$ 28.0	$ 35.8
Other | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue									9.00%	6.00%	6.00%

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