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The Company and its Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands |  | 3 Months Ended |
--- | --- | --- | ---
Sep. 15, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Company And Significant Accounting Policies [Line Items] |  |  |  |
Entity incorporation date |  | Aug. 05, 1999 |  |
Reverse stock split | 1-for-10 |  |  |
Cash and cash equivalents |  | $ 10,630 |  | $ 11,233
Net loss |  | (7,212) | $ (9,280) |
Cash from operations |  | $ (609) | $ (8,197) |
Accounting Standards Update 2016-02 |  |  |  |
Company And Significant Accounting Policies [Line Items] |  |  |  |
Change in accounting principle, accounting standards update, adopted |  | true |  |
Change in accounting principle, accounting standards update, adoption date |  | Jan. 01, 2022 |  |
Change in accounting principle, accounting standards update, immaterial effect |  | true |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: 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 + Details
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