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Condensed Consolidating Financial Statements - Statement of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Apr. 01, 2018 | Mar. 26, 2017
Condensed Financial Statements, Captions [Line Items] |  |
Service revenues | $ 46.0 | $ 49.2
Product sales | 97.0 | 82.8
Total revenues | 143.0 | 132.0
Cost of service revenues | 32.9 | 35.0
Cost of product sales | 69.3 | 60.9
Total costs | 102.2 | 95.9
Gross profit | 40.8 | 36.1
Selling, general and administrative expenses | 30.2 | 30.3
Research and development expenses | 3.6 | 4.4
Operating income from continuing operations | 7.0 | 1.4
Other income (expense): |  |
Interest income (expense), net | (5.1) | (8.2)
Loss on extinguishment of debt | 0.0 | (2.1)
Other income (expense), net | 0.3 | 0.2
Total other expense, net | (4.8) | (10.1)
Income (loss) from continuing operations before income taxes | 2.2 | (8.7)
Provision for income taxes from continuing operations | 0.9 | 1.4
Income (loss) from continuing operations | 1.3 | (10.1)
Income (loss) from discontinued operations | (3.5) | 0.1
Equity in net income (loss) of subsidiaries | 0.0 | 0.0
Net loss | (2.2) | (10.0)
Comprehensive income (loss) | (2.3) | (9.9)
Eliminations |  |
Condensed Financial Statements, Captions [Line Items] |  |
Service revenues | 0.0 | 0.0
Product sales | (4.9) | (3.2)
Total revenues | (4.9) | (3.2)
Cost of service revenues | 0.0 | 0.0
Cost of product sales | (4.9) | (3.2)
Total costs | (4.9) | (3.2)
Gross profit | 0.0 | 0.0
Selling, general and administrative expenses | 0.0 | 0.0
Research and development expenses | 0.0 | 0.0
Operating income from continuing operations | 0.0 | 0.0
Other income (expense): |  |
Interest income (expense), net | 0.0 | 0.0
Loss on extinguishment of debt |  | 0.0
Other income (expense), net | 0.0 | 0.0
Total other expense, net | 0.0 | 0.0
Income (loss) from continuing operations before income taxes | 0.0 | 0.0
Provision for income taxes from continuing operations | 0.0 | 0.0
Income (loss) from continuing operations | 0.0 | 0.0
Income (loss) from discontinued operations | 0.0 | 0.0
Equity in net income (loss) of subsidiaries | (7.0) | (2.3)
Net loss | (7.0) | (2.3)
Comprehensive income (loss) | (6.9) | (2.4)
Parent Company |  |
Condensed Financial Statements, Captions [Line Items] |  |
Service revenues | 0.0 | 0.0
Product sales | 0.0 | 0.0
Total revenues | 0.0 | 0.0
Cost of service revenues | 0.0 | 0.0
Cost of product sales | 0.0 | 0.0
Total costs | 0.0 | 0.0
Gross profit | 0.0 | 0.0
Selling, general and administrative expenses | 0.4 | 2.1
Research and development expenses | 0.0 | 0.0
Operating income from continuing operations | (0.4) | (2.1)
Other income (expense): |  |
Interest income (expense), net | (5.2) | (8.2)
Loss on extinguishment of debt |  | (2.1)
Other income (expense), net | (0.8) | 0.0
Total other expense, net | (6.0) | (10.3)
Income (loss) from continuing operations before income taxes | (6.4) | (12.4)
Provision for income taxes from continuing operations | 0.1 | 0.1
Income (loss) from continuing operations | (6.5) | (12.5)
Income (loss) from discontinued operations | 0.0 | (0.1)
Equity in net income (loss) of subsidiaries | 4.3 | 2.6
Net loss | (2.2) | (10.0)
Comprehensive income (loss) | (2.3) | (9.9)
Subsidiary Guarantors on a Combined Basis |  |
Condensed Financial Statements, Captions [Line Items] |  |
Service revenues | 42.7 | 46.6
Product sales | 85.5 | 73.3
Total revenues | 128.2 | 119.9
Cost of service revenues | 30.4 | 33.1
Cost of product sales | 63.2 | 54.0
Total costs | 93.6 | 87.1
Gross profit | 34.6 | 32.8
Selling, general and administrative expenses | 26.7 | 25.1
Research and development expenses | 3.2 | 4.0
Operating income from continuing operations | 4.7 | 3.7
Other income (expense): |  |
Interest income (expense), net | 0.1 | 0.0
Loss on extinguishment of debt |  | 0.0
Other income (expense), net | 0.8 | 0.0
Total other expense, net | 0.9 | 0.0
Income (loss) from continuing operations before income taxes | 5.6 | 3.7
Provision for income taxes from continuing operations | 0.5 | 1.0
Income (loss) from continuing operations | 5.1 | 2.7
Income (loss) from discontinued operations | (3.5) | 0.2
Equity in net income (loss) of subsidiaries | 2.7 | (0.3)
Net loss | 4.3 | 2.6
Comprehensive income (loss) | 4.3 | 2.6
Non-Guarantors on a Combined Basis |  |
Condensed Financial Statements, Captions [Line Items] |  |
Service revenues | 3.3 | 2.6
Product sales | 16.4 | 12.7
Total revenues | 19.7 | 15.3
Cost of service revenues | 2.5 | 1.9
Cost of product sales | 11.0 | 10.1
Total costs | 13.5 | 12.0
Gross profit | 6.2 | 3.3
Selling, general and administrative expenses | 3.1 | 3.1
Research and development expenses | 0.4 | 0.4
Operating income from continuing operations | 2.7 | (0.2)
Other income (expense): |  |
Interest income (expense), net | 0.0 | 0.0
Loss on extinguishment of debt |  | 0.0
Other income (expense), net | 0.3 | 0.2
Total other expense, net | 0.3 | 0.2
Income (loss) from continuing operations before income taxes | 3.0 | 0.0
Provision for income taxes from continuing operations | 0.3 | 0.3
Income (loss) from continuing operations | 2.7 | (0.3)
Income (loss) from discontinued operations | 0.0 | 0.0
Equity in net income (loss) of subsidiaries | 0.0 | 0.0
Net loss | 2.7 | (0.3)
Comprehensive income (loss) | $ 2.6 | $ (0.2)

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