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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Noncontrolling Interest [Member]
Total
Balance at Dec. 31, 2016 $ 26,842 $ 111,950 $ 124,559 $ (27,882) $ 235,469
Net income (loss) 32,843 32,843
Changes in cumulative translation adjustment 11,345 11,345
Adjustments related to postretirement benefits, net of tax (1,248) (1,248)
Changes in unrealized gains and losses on investments, net of tax (2) (2)
Cash dividends - $0.24 per share (6,676) (6,676)
Exercise of stock options 1,164 11,617 12,781
Shares issued under ESPP 99 1,140 1,239
Shares issued for restricted stock units vested 595 (595)
Repurchase and retirement of stock (211) (3,456) (3,667)
Share-based compensation expense 7,007 7,007
Balance at Dec. 30, 2017 28,489 127,663 150,726 (17,787) 289,091
Net income (loss) (32,424) (32,424)
Changes in cumulative translation adjustment (8,905) (8,905)
Adjustments related to postretirement benefits, net of tax 805 805
Changes in unrealized gains and losses on investments, net of tax 7 7
Cash dividends - $0.24 per share (7,689) (7,689)
Exercise of stock options 67 613 680
Shares issued under ESPP 85 1,438 1,523
Shares issued for restricted stock units vested 541 (541)
Repurchase and retirement of stock (195) (11,405) (11,600)
Share-based compensation expense 18,280 18,280
Cumulative effect of accounting change, a | Adjustments for New Accounting Principle, Early Adoption [Member] [1] 1,057 1,057
Noncontrolling interest (299) (299)
Shares issued for acquisition of Xcerra 11,776 283,642 295,418
Balance at Dec. 29, 2018 40,763 419,690 111,670 (25,880) (299) 545,944
Net income (loss) (69,692) (69,692)
Changes in cumulative translation adjustment (7,522) (4) (7,526)
Adjustments related to postretirement benefits, net of tax (628) (628)
Changes in unrealized gains and losses on investments, net of tax          
Cash dividends - $0.24 per share (9,866) (9,866)
Exercise of stock options 42 367 409
Shares issued under ESPP 187 2,159 2,346
Shares issued for restricted stock units vested 599 (599)
Repurchase and retirement of stock (196) (2,575) (2,771)
Share-based compensation expense 14,148 14,148
Cumulative effect of accounting change, a | Adjustments for New Accounting Principle, Early Adoption [Member] [2] 10,352 10,352
Noncontrolling interest 53 (53)
Divestiture of interest in consolidated entity 356 356
Balance at Dec. 28, 2019 $ 41,395 $ 433,190 $ 42,517 $ (34,030) $ 483,072
[1] Cumulative effect of accounting change relates to our adoption of ASU 2014-09.
[2] Cumulative effect of accounting change relates to our adoption of ASU 2016-02. Please refer to Note 1 of the Consolidated Financial Statements for further detail on the adoption of this accounting standard.