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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 3 Months Ended
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Mar. 31, 2022
Accounting Policies [Abstract] |
Disaggregation of Revenue | License revenues were comprised of the following for the periods presented:
| Three Months Ended March 31,
| 2022 |  | 2021
| (In thousands)
Paid-up license revenue agreements | $ | 2,193 |  |  | $ | 5,410 |
Recurring License Revenue Agreements | 422 |  |  | 393 |
Total | $ | 2,615 |  |  | $ | 5,803 |
Printronix's net revenues were comprised of the following:
| Three Months Ended March 31,
| 2022 |  |
| (In thousands)
Printers, consumables and parts | $ | 9,638 |  |  |
Services | 1,254 |  |  |
Total | $ | 10,892 |  |  |
Schedule of Other Operating Cost and Expense, by Component | Cost of revenues were comprised of the following for the periods presented:
| Three Months Ended March 31,
| 2022 |  | 2021
| (In thousands)
Inventor royalties | $ | 170 |  |  | $ | 95 |
Contingent legal fees | 549 |  |  | 1,094 |
Litigation and licensing expenses | 1,244 |  |  | 2,262 |
Amortization of patents | 2,601 |  |  | 1,862 |
Total | $ | 4,564 |  |  | $ | 5,313 |
Schedule of Product Warranty Liability | The following is a summary of the accrued warranty liabilities, which are included in accrued expenses and other current liabilities, and other long-term liabilities in the consolidated balance sheets:
| Three Months Ended March 31,
| 2022 |  |
| (In thousands)
Beginning balance | $ | 222 |  |  |
Estimated future warranty expense | 11 |  |  |
Warranty claims settled | (63) |  |  |
Ending balance | $ | 170 |  |  |
Unrealized Gain (Loss) on Investments | Equity securities at fair value for the periods presented were comprised of the following:
Security Type |  | Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
|  | (In thousands)
March 31, 2022: |  |  |  |  |  |  |  |
Equity securities - Life Sciences Portfolio (Note 3) |  | $ | 48,279 |  |  | $ | 92,253 |  |  | $ | (2,570) |  |  | $ | 137,962 |
Equity securities - other common stock |  | 108,489 |  |  | 11,822 |  |  | (11,789) |  |  | 108,522 |
Total |  | $ | 156,768 |  |  | $ | 104,075 |  |  | $ | (14,359) |  |  | $ | 246,484 |
December 31, 2021: |  |  |  |  |  |  |  |
Equity securities - Life Sciences Portfolio (Note 3) |  | $ | 56,037 |  |  | $ | 262,811 |  |  | $ | (1,488) |  |  | $ | 317,360 |
Equity securities - other common stock |  | 43,822 |  |  | 2,068 |  |  | (1,472) |  |  | 44,418 |
Total |  | $ | 99,859 |  |  | $ | 264,879 |  |  | $ | (2,960) |  |  | $ | 361,778 |
The following unrealized and realized gains or losses from our investment in the Life Sciences Portfolio are recorded in the change in fair value of equity securities and gain or loss on sale of equity securities, respectively, in the consolidated statements of operations:
| Three Months Ended March 31,
| 2022 |  | 2021
| (In thousands)
Change in fair value of equity securities of public companies | $ | (171,640) |  |  | $ | 5,374 |
Change in fair value of equity securities without readily determinable fair value | — |  |  | 31,802 |
Gain (loss) on sale of equity securities of public companies | 59,488 |  |  | — |
Net realized and unrealized (loss) gain | $ | (112,152) |  |  | $ | 37,176 |
Schedule of Useful Lives of Property and Equipment | Depreciation and amortization is computed on a straight-line basis over the following estimated useful lives of the assets:
Machinery and equipment | 2 to 10 years
Furniture and fixtures | 3 to 5 years
Computer hardware and software | 3 to 5 years
Leasehold improvements | 2 to 5 years (Lesser of lease term or useful life of improvement)

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