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Note 11 - ShareBased Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2022 | Jan. 01, 2022 | Jan. 02, 2021 | Dec. 29, 2018 | Dec. 31, 2016 | Dec. 27, 2015 | Dec. 30, 2022 | Jan. 31, 2022 | Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) |  |  | 10 years |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | $ 1,600 | $ 1,400 | $ 1,100 |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total |  | $ 1,600 | $ 1,600 |  |  |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  | 1,754,852 | 1,754,852 | 1,101,662 | 1,380,628 |  |  |  |  |  |
Dividends Payable |  | $ 0 | $ 0 |  |  |  |  |  |  |  |
Share Price (in dollars per share) |  |  |  |  |  |  |  |  | $ 12.34 |  |
Employee Stock Purchase Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | $ 300 | $ 100 | $ 44 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date |  |  | 85.00% |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate |  | 10.00% | 10.00% |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in shares) |  |  | 3,000 |  |  |  |  |  |  |  |
Additional Shares of Common Stock Reserved for Future Issuance (in shares) |  |  |  | 400,000 |  | 300,000 |  | 300,000 |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  |  | 1,800,000 |  | 1,400,000 |  | 1,100,000 |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares) |  |  | 83,879 | 101,784 | 117,983 |  |  |  |  |  |
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised, Total |  |  | $ 400 | $ 100 | $ 200 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) |  | 364,231 | 364,231 |  |  |  |  |  |  |  |
The 2014 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) |  | 890,682 | 890,682 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) |  | 2,975,000 | 2,975,000 |  |  |  |  |  |  |  | 625,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) |  |  | 1,000,000 |  | 850,000 |  | 500,000 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value |  |  | $ 3,500 | 2,900 | $ 1,500 |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested |  | $ 6,200 | 6,200 |  |  |  |  |  |  |  |
Performance-based Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | $ 800 | $ 400 | $ 0 |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) |  | 225,000 | 225,000 |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total |  | $ 1,100 | $ 1,100 |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 100,000 | 125,000 | 0 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |  |  | $ 11.96 | $ 3.26 | $ 0 |  |  |  |  |  |
Performance-based Restricted Stock Units [Member] | The 2014 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | $ 800 | $ 400 | $ 0 |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) |  | 225,000 | 225,000 | 125,000 |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 225,000 |  |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options, Maximum Shares Upon Adjustment (in shares) |  | 125,000 | 125,000 |  |  |  |  |  |  | 125,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) |  | 100,000 |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |  |  | $ 8.73 |  |  |  |  |  |  |  |
Performance-based Restricted Stock Units [Member] | The 2014 Plan [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) | 125,000 |  |  |  |  |  |  |  |  |  |
Time-based Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total |  | $ 500 | $ 500 |  |  |  |  |  |  |  |
Share Price (in dollars per share) |  |  |  |  |  |  |  |  | $ 12.34 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 56,500 | 163,005 | 719,805 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |  |  | $ 8.07 | $ 3.81 | $ 1.88 |  |  |  |  |  |
Time-based Restricted Stock Units [Member] | Immediately Vested [Member] |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 1,000 | 125,000 | 100,092 |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |  |  | $ 18.48 | $ 2.17 | $ 1.33 |  |  |  |  |  |
Time-based Restricted Stock Units [Member] | Senior Management [Member] |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  | 250,000 |  |  |  |  |  |
Time-based Restricted Stock Units [Member] | The 2014 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares) |  | 274,939 | 274,939 | 420,628 |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total |  | $ 500 | $ 500 |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested |  | $ 600 | $ 600 |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 56,500 |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |  |  | $ 8.07 |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  | 1 year |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  | 5 years |  |  |  |  |  |  |  |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |