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Cash, Cash Equivalents and Short-Term Investments (Details) - Schedule of cash, cash equivalents and short-term investments - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Cash and cash equivalents: |  |
Total cash and cash equivalents | $ 18,442 | $ 17,675
Short-term investments: |  |
Total short-term investments | 9,247 | 15,921
Cash [Member] |  |
Cash and cash equivalents: |  |
Total cash and cash equivalents | 2,426 | 845
Money market funds [Member] |  |
Cash and cash equivalents: |  |
Total cash and cash equivalents | 16,016 | 16,830
Certificates of deposit [Member] |  |
Short-term investments: |  |
Total short-term investments | 249 | 250
Commercial paper [Member] |  |
Short-term investments: |  |
Total short-term investments | 548 | 2,210
Corporate notes [Member] |  |
Short-term investments: |  |
Total short-term investments | 7,998 | 12,024
Municipal bonds [Member] |  |
Short-term investments: |  |
Total short-term investments | $ 452 | $ 1,437

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- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=126999549&loc=SL98516268-108586 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585 + Details
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