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v3.22.1

Supplementary Balance Sheet Information | 3 Months Ended
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Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Supplementary Balance Sheet Information | Supplementary Balance Sheet Information 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 |
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 |
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 The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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