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Significant Accounting Policies - Additional Information (Details) | 12 Months Ended |
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Dec. 31, 2021 USD ($) Performance_Obligation Segment shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2014 USD ($) $ / shares shares
Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash | $ 2,138,000 | $ 2,138,000 |  |
Unbilled receivables | 200,000 | 900,000 |  |
Impairment of goodwill | 0 |  |  |
Impairment losses on intangible assets | $ 0 |  |  |
Warrants issued to purchase stock | shares | 0 |  |  |
Fair value adjustment of warrants |  |  | $ 2,266,000 |
Advertising expenses | $ 22,400,000 | $ 14,500,000 | 6,600,000 |
Number of operating segment | Segment | 1 |  |  |
Number of reportable segments | Segment | 1 |  |  |
Sequencing Revenue |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Number of revenue performance obligations | Performance_Obligation | 2 |  |  |
Series C Convertible Preferred Stock |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Warrants issued to purchase stock | shares |  |  |  | 56,875
Weighted-average exercise price of warrants | $ / shares |  |  |  | $ 2.64
Line of credit facility |  |  |  | $ 5,000,000.0
Fair value adjustment of warrants |  |  | $ 2,300,000 |
Financial liabilities | $ 2,600,000 |  |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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