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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Total
--- | --- | --- | --- | --- | ---
Balances (in shares) at Dec. 29, 2018 | 129,728,000 |  |  |  |
Balances at Dec. 29, 2018 | $ 1,297 | $ 736,274 | $ (476,783) | $ (2,331) | $ 258,457
Net income | $ 0 | 0 | 29,506 | 0 | 29,506
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of shares withheld for employee taxes (in shares) | 3,774,000 |  |  |  |
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of shares withheld for employee taxes | $ 38 | 8,327 | 0 | 0 | 8,365
Stock-based compensation related to stock options, ESPP and RSUs | 0 | 13,335 | 0 | 0 | 13,335
Translation adjustments, net of tax | 0 | 0 | 0 | (7) | (7)
Change in actuarial valuation of defined benefit pension |  |  |  |  | 0
Unrealized loss related to marketable securities, net of tax | 0 | 0 | 0 | 42 | 42
Recognized gain on redemption of marketable securities, previously unrealized | $ 0 | 0 | 0 | (53) | (53)
Balances (in shares) at Sep. 28, 2019 | 133,502,000 |  |  |  |
Balances at Sep. 28, 2019 | $ 1,335 | 757,936 | (447,277) | (2,349) | 309,645
Balances (in shares) at Jun. 29, 2019 | 132,536,000 |  |  |  |
Balances at Jun. 29, 2019 | $ 1,325 | 756,924 | (460,816) | (2,256) | 295,177
Net income | $ 0 | 0 | 13,539 | 0 | 13,539
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of shares withheld for employee taxes (in shares) | 966,000 |  |  |  |
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of shares withheld for employee taxes | $ 10 | (4,668) | 0 | 0 | (4,658)
Stock-based compensation related to stock options, ESPP and RSUs | 0 | 5,680 | 0 | 0 | 5,680
Translation adjustments, net of tax | $ 0 | 0 | 0 | (93) | (93)
Change in actuarial valuation of defined benefit pension |  |  |  |  | 0
Unrealized loss related to marketable securities, net of tax |  |  |  |  | 0
Recognized gain on redemption of marketable securities, previously unrealized |  |  |  |  | 0
Balances (in shares) at Sep. 28, 2019 | 133,502,000 |  |  |  |
Balances at Sep. 28, 2019 | $ 1,335 | 757,936 | (447,277) | (2,349) | $ 309,645
Balances (in shares) at Dec. 28, 2019 | 133,883,000 |  |  |  | 133,883,000
Balances at Dec. 28, 2019 | $ 1,339 | 762,213 | (433,290) | (2,603) | $ 327,659
Net income | $ 0 | 0 | 31,403 | 0 | 31,403
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of shares withheld for employee taxes (in shares) | 2,195,000 |  |  |  |
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of shares withheld for employee taxes | $ 22 | (12,811) | 0 | 0 | (12,789)
Stock-based compensation related to stock options, ESPP and RSUs | 0 | 30,228 | 0 | 0 | 30,228
Translation adjustments, net of tax | 0 | 0 | 0 | 899 | 899
Change in actuarial valuation of defined benefit pension | $ 0 | 0 | 0 | (507) | (507)
Unrealized loss related to marketable securities, net of tax |  |  |  |  | 0
Recognized gain on redemption of marketable securities, previously unrealized |  |  |  |  | $ 0
Balances (in shares) at Sep. 26, 2020 | 136,078,000 |  |  |  | 136,078,000
Balances at Sep. 26, 2020 | $ 1,361 | 779,630 | (401,887) | (2,211) | $ 376,893
Balances (in shares) at Jun. 27, 2020 | 135,147,000 |  |  |  |
Balances at Jun. 27, 2020 | $ 1,351 | 779,836 | (414,494) | (2,563) | 364,130
Net income | $ 0 | 0 | 12,607 | 0 | 12,607
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of shares withheld for employee taxes (in shares) | 931,000 |  |  |  |
Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs, net of shares withheld for employee taxes | $ 10 | (10,694) | 0 | 0 | (10,684)
Stock-based compensation related to stock options, ESPP and RSUs | 0 | 10,488 | 0 | 0 | 10,488
Translation adjustments, net of tax | 0 | 0 | 0 | 859 | 859
Change in actuarial valuation of defined benefit pension | $ 0 | 0 | 0 | (507) | (507)
Unrealized loss related to marketable securities, net of tax |  |  |  |  | 0
Recognized gain on redemption of marketable securities, previously unrealized |  |  |  |  | $ 0
Balances (in shares) at Sep. 26, 2020 | 136,078,000 |  |  |  | 136,078,000
Balances at Sep. 26, 2020 | $ 1,361 | $ 779,630 | $ (401,887) | $ (2,211) | $ 376,893

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