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Income Taxes - Operating Loss and Tax Credit Carryforwards (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013
Operating loss and tax credit carryforwards |  |  |
Net deferred tax assets (Liabilities) | $ 23,511 | $ 27,590 |
Provision for U.S. federal and state income taxes | 0 |  |
Income tax benefit reflected in earnings | (677) | (11,019) | $ (12,208)
Singapore |  |  |
Operating loss and tax credit carryforwards |  |  |
Income tax benefit reflected in earnings | $ 14,400 | $ 2,000 | $ 2,200
The income tax benefit (Expense) per diluted share (in dollars per share) | $ 0.34 | $ 0.05 | $ 0.05
Federal |  |  |
Operating loss and tax credit carryforwards |  |  |
Research and development tax credit carryforwards | $ 5,100 |  |
State |  |  |
Operating loss and tax credit carryforwards |  |  |
Operating loss carryforwards | 54,000 |  |
Research and development tax credit carryforwards | 12,500 |  |
Cygnal Integrated Products, Silicon Clocks, Spectra Linear and Ember | Federal |  |  |
Operating loss and tax credit carryforwards |  |  |
Operating loss carryforwards | 53,800 |  |
Research and development tax credit carryforwards | 2,000 |  |
Energy Micro | Foreign |  |  |
Operating loss and tax credit carryforwards |  |  |
Operating loss carryforwards | 15,800 |  |
Bluegiga | Foreign |  |  |
Operating loss and tax credit carryforwards |  |  |
Operating loss carryforwards | $ 200 |  |

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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, before jurisdictional netting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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