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v3.22.1

Supplementary Balance Sheet Information (Tables) | 3 Months Ended
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Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Investments Available-for-sale | Investments available for sale consist of the following:
| As of March 31, 2022
(in thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
Maturity less than 1 year: |  |  |  |  |  |  |
Certificate of deposit | $ | 9,250 |  |  | $ | 4 |  |  | $ | (15) |  |  | $ | 9,239 |
Corporate debt securities | 55,056 |  |  | 1 |  |  | (293) |  |  | 54,764 |
Commercial paper | 10,539 |  |  | — |  |  | (71) |  |  | 10,468 |
U.S. treasury securities | 20,061 |  |  | — |  |  | (122) |  |  | 19,939 |
Total maturity less than 1 year | 94,906 |  |  | 5 |  |  | (501) |  |  | 94,410 |
Maturity 1 to 2 years: |  |  |  |  |  |  |
Corporate debt securities | 15,152 |  |  | — |  |  | (252) |  |  | 14,900 |
Total maturity 1 to 2 years | 15,152 |  |  | — |  |  | (252) |  |  | 14,900 |
Total short-term investments | $ | 110,058 |  |  | $ | 5 |  |  | $ | (753) |  |  | $ | 109,310 |
| As of December 31, 2021
(in thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Market Value
Maturity less than 1 year: |  |  |  |  |  |  |
Certificate of deposit | $ | 1,260 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,260 |
Corporate debt securities | 58,822 |  |  | 2 |  |  | (38) |  |  | 58,786 |
Commercial paper | 14,453 |  |  | 4 |  |  | (3) |  |  | 14,454 |
Non U.S. government | 728 |  |  | — |  |  | — |  |  | 728 |
U.S. treasury securities | 20,380 |  |  | — |  |  | (24) |  |  | 20,356 |
Total maturity less than 1 year | 95,643 |  |  | 6 |  |  | (65) |  |  | 95,584 |
Maturity 1 to 2 years: |  |  |  |  |  |  |
Corporate debt securities | 29,676 |  |  | 1 |  |  | (73) |  |  | 29,604 |
U.S. treasury securities | 3,701 |  |  | — |  |  | (11) |  |  | 3,690 |
Total maturity 1 to 2 years | 33,377 |  |  | 1 |  |  | (84) |  |  | 33,294 |
Total short-term investments | $ | 129,020 |  |  | $ | 7 |  |  | $ | (149) |  |  | $ | 128,878 |
Schedule of Components of Property and Equipment | Property and equipment consist of the following:
(in thousands) | As of March 31, 2022 |  | As of December 31, 2021
Furniture and office equipment | $ | 1,064 |  |  | $ | 955 |
Leasehold improvements | 2,046 |  |  | 1,962 |
Laboratory equipment | 912 |  |  | 906 |
| 4,022 |  |  | 3,823 |
Less—accumulated depreciation and amortization | (3,472) |  |  | (3,441) |
Property and equipment, net | $ | 550 |  |  | $ | 382 |
Schedule of Accrued Liabilities | Accrued liabilities consisted of the following:
(in thousands) | As of March 31, 2022 |  | As of December 31, 2021
Accrued compensation | $ | 878 |  |  | $ | 1,435 |
Preferred stock dividend | 420 |  |  | 414 |
Clinical trials | 2,110 |  |  | 1,639 |
Research agreements and services | 992 |  |  | 726 |
Director fees | 141 |  |  | 141 |
Professional fees and outside services | 53 |  |  | 63 |
Patent, license and other fees | 75 |  |  | 43 |
Other accrued liabilities | 69 |  |  | 66 |
Total accrued liabilities | $ | 4,738 |  |  | $ | 4,527 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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