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RETIREMENT SAVINGS PLAN AND EXECUTIVE SEVERANCE POLICY - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contribution to retirement plan |  | $ 0 | $ 0
Percent of employees' pay to match contribution | 1.00% |  |
Defined contribution plan, employer matching contribution, per cent addition of employees' gross pay | $ 0.50 |  |
Defined benefit plan, plan assets, administration expense |  | $ 332,000 | $ 304,000
Printronix |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contribution to retirement plan | $ 9,000 |  |
Percent of employees' pay to match contribution | 1.00% |  |
Defined benefit contribution vesting period | 4 years |  |
Printronix | Foreign Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contribution to retirement plan | $ 189,000 |  |

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