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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Tables) | 12 Months Ended
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Sep. 29, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Company’s matching contributions to the Plan | The following table reflects the Company’s contributions to the Plan during fiscal 2018 and 2017:
|  | Fiscal
(in thousands) |  | 2018 |  | 2017
Cash |  | $ | 1,610 |  |  | $ | 1,645 |
Accumulated other comprehensive income reflected on the Consolidated Balance Sheets | The following table reflects accumulated other comprehensive income / (loss) reflected on the Consolidated Balance Sheets as of September 29, 2018 and September 30, 2017:
|  | As of
(in thousands) |  | September 29, 2018 |  | September 30, 2017
(Loss) / Gain from foreign currency translation adjustments |  | $ | (1,211 | ) |  | $ | 2,422 |
Unrecognized actuarial loss on pension plan, net of tax |  | (1,620 | ) |  | (1,736 | )
Unrealized (loss) / gain on hedging |  | (1,071 | ) |  | 1,353 |
Accumulated other comprehensive (loss) / income |  | $ | (3,902 | ) |  | $ | 2,039 |
Equity-based compensation expense | The following table reflects total equity-based compensation expense, which includes Relative TSR PSUs, Time-based RSUs, Special/Growth PSUs, Performance-based Restricted Stock and common stock, included in the Consolidated Statements of Operations for fiscal 2018, 2017, and 2016:
|  | Fiscal
(in thousands) |  | 2018 |  | 2017 |  | 2016
Cost of sales |  | $ | 515 |  |  | $ | 463 |  |  | $ | 421 |
Selling, general and administrative (1) |  | 8,548 |  |  | 9,015 |  |  | 3,244 |
Research and development |  | 2,622 |  |  | 2,244 |  |  | 2,065 |
Total equity-based compensation expense |  | $ | 11,685 |  |  | $ | 11,722 |  |  | $ | 5,730 |
(1) The selling, general and administrative expense for fiscal 2016, includes the reversal of a $2.0 million expense due to the forfeiture of stock awards in connection with the October 2015 retirement of the Company's CEO. The following table reflects equity-based compensation expense, by type of award, for fiscal 2018, 2017, and 2016:
|  | Fiscal
(in thousands) |  | 2018 |  | 2017 |  | 2016
Relative TSR PSUs |  | $ | 3,583 |  |  | $ | 3,480 |  |  | $ | (33 | )
Time-based RSUs |  | 7,027 |  |  | 7,492 |  |  | 5,255 |
Performance-based restricted stock |  | — |  |  | — |  |  | (43 | )
Special/Growth PSUs |  | 295 |  |  | — |  |  | — |
Common stock |  | 780 |  |  | 750 |  |  | 551 |
Total equity-based compensation expense (1) |  | $ | 11,685 |  |  | $ | 11,722 |  |  | $ | 5,730 |
(1) The equity-based compensation expense for fiscal 2016, includes the reversal of a $2.0 million expense due to the forfeiture of stock awards in connection with the October 2015 retirement of the Company's CEO.
Employee market-based restricted stock activity | The following table reflects Relative TSR PSUs activity for fiscal 2018, 2017, and 2016:
| Number of shares (in thousands) |  | Unrecognized compensation expense (in thousands) |  | Average remaining service period (in years) |  | Weighted average grant date fair value per share
Relative TSR PSUs outstanding as of October 3, 2015 | 578 |  |  | $ | 4,465 |  |  | 1.4 |  |
Granted | 172 |  |  |  |  |  |  | $ | 12.26 |
Forfeited or expired | (256 | ) |  |  |  |  |  |
Vested | (10 | ) |  |  |  |  |  |
Relative TSR PSUs outstanding as of October 1, 2016 | 484 |  |  | $ | 2,924 |  |  | 1.0 |  |
Granted | 388 |  |  |  |  |  |  | $ | 13.47 |
Forfeited or expired | (3 | ) |  |  |  |  |  |
Vested | (196 | ) |  |  |  |  |  |
Relative TSR PSUs outstanding as of September 30, 2017 | 673 |  |  | $ | 6,204 |  |  | 1.4 |  |
Granted | 180 |  |  |  |  |  |  | $ | 29.60 |
Forfeited or expired | (146 | ) |  |  |  |  |  |
Vested | (168 | ) |  |  |  |  |  |
Relative TSR PSUs outstanding as of September 29, 2018 | 539 |  |  | $ | 4,629 |  |  | 1.1 |  |
Schedule of Assumptions Used to Calculate Compensation Expense | The following table reflects the assumptions used to calculate compensation expense related to the Company’s Relative TSR PSUs issued during fiscal 2018, 2017, and 2016:
| Fiscal
| 2018 |  | 2017 |  | 2016
Grant Price | $ | 19.65 |  |  | $ | 12.51 |  |  | $ | 9.58 |
Expected dividend yield(1) | 0.12% |  |  | N/A |  |  | N/A |
Expected stock price volatility | 31.71 | % |  | 30.39 | % |  | 30.85 | %
Risk-free interest rate | 1.68 | % |  | 0.96 | % |  | 0.89 | %
Employee time-based restricted stock activity | The following table reflects Time-based RSUs activity for fiscal 2018, 2017, and 2016:
| Number of shares (in thousands) |  | Unrecognized compensation expense (in thousands) |  | Average remaining service period (in years) |  | Weighted average grant date fair value per share
Time-based RSUs outstanding as of October 3, 2015 | 849 |  |  | $ | 7,054 |  |  | 1.6 |  |
Granted | 597 |  |  |  |  |  |  | $ | 9.66 |
Forfeited or expired | (85 | ) |  |  |  |  |  |
Vested | (346 | ) |  |  |  |  |  |
Time-based RSUs outstanding as of October 1, 2016 | 1,015 |  |  | $ | 6,440 |  |  | 1.5 |  |
Granted | 715 |  |  |  |  |  |  | $ | 13.32 |
Forfeited or expired | (50 | ) |  |  |  |  |  |
Vested | (600 | ) |  |  |  |  |  |
Time-based RSUs outstanding as of September 30, 2017 | 1,080 |  |  | $ | 7,770 |  |  | 1.5 |  |
Granted | 459 |  |  |  |  |  |  | $ | 22.32 |
Forfeited or expired | (87 | ) |  |  |  |  |  |
Vested | (542 | ) |  |  |  |  |  |
Time-based RSUs outstanding as of September 29, 2018 | 910 |  |  | $ | 9,038 |  |  | 1.4 |  |
Schedule of Performance Based Restricted Stock Activity | The following table reflects Performance-based restricted stock activity for fiscal 2018, 2017, and 2016:
| Number of shares (in thousands) |  | Unrecognized compensation expense (in thousands) |  | Average remaining service period (in years)
Performance-based restricted stock outstanding as of October 3, 2015 | 57 |  |  | $ | 285 |  |  | 2.2
Granted | — |  |  |  |  |
Forfeited or expired | (29 | ) |  |  |  |
Vested | (28 | ) |  |  |  |
Performance-based restricted stock outstanding as of October 1, 2016 | — |  |  | — |  |  | 0
Schedule of Special/Growth Based Restricted Stock Activity | The following table reflects Special/Growth PSUs activity for fiscal 2018, 2017, and 2016:
| Number of shares (in thousands) |  | Unrecognized compensation expense (in thousands) |  | Average remaining service period (in years) |  | Weighted average grant date fair value per share
Special/Growth PSUs outstanding as of September 30, 2017 | — |  |  |  |  |  |  |
Granted | 60 |  |  |  |  |  |  | $ | 22.57 |
Forfeited or expired | (14 | ) |  |  |  |  |  |
Vested | — |  |  |  |  |  |  |
Special/Growth PSUs outstanding as of September 29, 2018 | 46 |  |  | $ | 702 |  |  | 2.1 |  |
Employee stock option activity | The following table reflects employee stock option activity for fiscal 2018, 2017, and 2016:
| Number of shares (in thousands) |  | Weighted average exercise price |  | Average remaining contractual life (in years) |  | Aggregate intrinsic value (in thousands)
Options outstanding as of October 3, 2015 | 147 |  |  | $ | 8.18 |  |  |  |  |
Exercised | (53 | ) |  | $ | 5.40 |  |  |  |  | $ | 330 |
Forfeited or expired | (4 | ) |  | $ | 9.00 |  |  |  |  |
Options outstanding as of October 1, 2016 | 90 |  |  | $ | 8.41 |  |  |  |  |
Exercised | (61 | ) |  | $ | 8.31 |  |  |  |  | $ | 531 |
Forfeited or expired | (13 | ) |  | $ | 8.50 |  |  |  |  |
Options outstanding as of September 30, 2017 | 16 |  |  | $ | 8.73 |  |  |  |  |
Exercised | (6 | ) |  | $ | 8.74 |  |  |  |  | $ | 73 |
Forfeited or expired | (8 | ) |  | $ | 8.74 |  |  |  |  |
Options outstanding as of September 29, 2018 | 2 |  |  | $ | 8.64 |  |  | 1.6 |  | $ | 25 |
Options vested and expected to vest as of September 29, 2018 | 2 |  |  | $ | 8.64 |  |  | 1.6 |  | $ | 25 |
Options exercisable as of September 29, 2018 | 2 |  |  | $ | 8.64 |  |  | 1.6 |  |
In the money exercisable options as of September 29, 2018 | 2 |  |  |  |  |  |  | $ | 25 |
Outstanding and exercisable employee stock options | The following table reflects outstanding and exercisable employee stock options as of September 29, 2018:
|  | Options Outstanding |  | Options Exercisable
Range of exercise prices |  | Options outstanding (in thousands) |  | Weighted average remaining contractual life (in years) |  | Weighted average exercise price |  | Options exercisable (in thousands) |  | Weighted average exercise price
8.64 |  | 2 |  |  | 1.6 |  | $ | 8.64 |  |  | 2 |  |  | $ | 8.64 |
Common stock issued to non-employee directors | The following table reflects shares of common stock issued to non-employee directors and the corresponding fair value for fiscal 2018, 2017, and 2016:
| Fiscal
(in thousands) | 2018 |  | 2017 |  | 2016
Number of common shares issued | 33 |  |  | 45 |  |  | 50 |
Fair value based upon market price at time of issue | $ | 780 |  |  | $ | 750 |  |  | $ | 551 |
Non-employee director stock option activity | The following table reflects non-employee director stock option activity for fiscal 2018, 2017, and 2016:
| Number of shares (in thousands) |  | Weighted average exercise price |  | Average remaining contractual life (in years) |  | Aggregate intrinsic value (in thousands)
Options outstanding as of October 3, 2015 | 20 |  |  | $ | 11.20 |  |  |  |  | $ | 225 |
Exercised | — |  |  | $ | — |  |  |  |  |
Forfeited or expired | (20 | ) |  | $ | 11.20 |  |  |  |  |
Options outstanding as of October 1, 2016 | — |  |  | $ | — |  |  |  |  | $ | — |
No non-employee director stock options were granted during fiscal 2018, 2017, and 2016.
Defined benefits pension obligations and pension expenses | The following table reflects the Company's defined benefits pension obligations, mainly in Switzerland and Taiwan, as of September 29, 2018 and September 30, 2017:
|  | As of
(in thousands) | September 29, 2018 |  | September 30, 2017
Switzerland pension obligation | $ | 1,980 |  |  | $ | 1,951 |
Taiwan pension obligation | 1,256 |  |  | 967 |

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