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Stock Plans (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of each of these option awards is estimated on the date of grant using the Black-Scholes option pricing model with the weighted average assumptions noted in the following table. Expected volatility is based on the historical volatility of the Company’s common stock. The expected term takes into consideration option exercise history. The risk-free interest rate is based on the U.S. Treasury yield curve in effect on the date of grant which most closely corresponds to the expected term of the Time-Vesting Options. The dividend yield is based on the Company’s historic average dividend yield.
|  | December 31, 2022 |  | January 1, 2022 |  | January 2, 2021
Dividend yield |  | 0.0% |  | 0.0% |  | 0.0%
Volatility |  | 57.0% - 57.1% |  | 56.7% |  | 56.5% - 56.7%
Risk-free interest rate |  | 2.36% - 2.86% |  | 1.13% |  | 0.45% - 0.52%
Expected term (years) |  | 6.0 - 7.0 |  | 6.5 |  | 5.9 - 6.5
Schedule of Share-based Compensation, Stock Options Activity | A summary of all option activity under the Stock Plans and with respect to the Inducement Option and the Initial Option Agreement (as defined below) for the fiscal year ended December 31, 2022 is presented below.
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Life (Yrs.) |  |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2022 |  |  | 5,706 |  |  | $ | 36.13 |  |  |  |  |  |  |  |  |
Granted |  |  | 2,227 |  |  | $ | 22.75 |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Cancelled |  |  | (529 | ) |  | $ | 20.36 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2022 |  |  | 7,404 |  |  | $ | 33.23 |  |  |  | 4.0 |  |  | $ | — |
Exercisable at December 31, 2022 |  |  | 5,144 |  |  | $ | 37.31 |  |  |  | 2.5 |  |  | $ | — |
|  |  |  |  | , |  |  |  |  |  |  |  |  |  |  |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity | A summary of RSU activity under the Stock Plans for the fiscal year ended December 31, 2022 is presented below.
|  | Shares |  |  | Weighted-Average Grant-Date Fair Value |
Outstanding at January 1, 2022 |  |  | 1,595 |  |  | $ | 21.99 |
Granted |  |  | 2,221 |  |  | $ | 6.69 |
Vested |  |  | (655 | ) |  | $ | 22.25 |
Forfeited |  |  | (750 | ) |  | $ | 17.90 |
Outstanding at December 31, 2022 |  |  | 2,411 |  |  | $ | 9.09 |
Schedule of Share-based Compensation, Performance Stock Units Award Activity | A summary of PSU activity under the 2014 Plan for the fiscal year ended December 31, 2022 is presented below.
|  | Shares |  |  | Weighted-Average Grant-Date Fair Value |
Outstanding at January 1, 2022 |  |  | 201 |  |  | $ | 18.94 |
Granted |  |  | — |  |  | $ | — |
Vested |  |  | — |  |  | $ | — |
Forfeited |  |  | (201 | ) |  | $ | 18.94 |
Outstanding at December 31, 2022 |  |  | — |  |  | $ | — |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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