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Summary of Significant Accounting Policies - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) Customers Segment Financialinstitution | Dec. 31, 2020 USD ($) Customers | Dec. 31, 2019 USD ($) Customers
Accounting Policies [Line Items] |  |  |
Provision for accounts receivable | $ 74,000 | $ 74,000 |
Impairment charge of goodwill | 0 | 0 |
One-time license fee payable for each license sold to customer | 5,000 |  |
Minimum annual amount due under license agreement | 75,000 |  |
Minimum amount incurred under license agreement | $ 75,000 | $ 75,000 | $ 75,000
Expected dividend yield | 0.00% |  |
Number of operating segment | Segment | 1 |  |
Number of reportable segment | Segment | 1 |  |
Description of uncertain income tax position | For tax positions meeting the more likely than not threshold, the amount recognized in the consolidated financial statements is the largest benefit that has a greater than 50 percent likelihood of being realized upon ultimate settlement with the relevant tax authority |  |
Software Technology | HunchLab |  |  |
Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives | 5 years |  |
Patents |  |  |
Accounting Policies [Line Items] |  |  |
Estimated useful life of intangible assets | 3 years |  |
Customer Concentration Risk | Accounts Receivable |  |  |
Accounting Policies [Line Items] |  |  |
Number of customers | Customers | 1 | 3 |
Customer Concentration Risk | Revenues |  |  |
Accounting Policies [Line Items] |  |  |
Number of customers | Customers | 2 | 2 | 2
Customer Concentration Risk | Customer One | Accounts Receivable |  |  |
Accounting Policies [Line Items] |  |  |
Concentration risk percentage | 65.00% | 37.00% |
Customer Concentration Risk | Customer One | Revenues |  |  |
Accounting Policies [Line Items] |  |  |
Concentration risk percentage | 28.00% | 18.00% | 20.00%
Customer Concentration Risk | Customer Two | Accounts Receivable |  |  |
Accounting Policies [Line Items] |  |  |
Concentration risk percentage |  | 27.00% |
Customer Concentration Risk | Customer Two | Revenues |  |  |
Accounting Policies [Line Items] |  |  |
Concentration risk percentage | 14.00% | 15.00% | 14.00%
Customer Concentration Risk | Customer Three | Accounts Receivable |  |  |
Accounting Policies [Line Items] |  |  |
Concentration risk percentage |  | 11.00% |
United States | Credit Concentration Risk |  |  |
Accounting Policies [Line Items] |  |  |
Number of financial institutions at which cash deposits are maintained | Financialinstitution | 1 |  |
International | Credit Concentration Risk |  |  |
Accounting Policies [Line Items] |  |  |
Number of financial institutions at which cash deposits are maintained | Financialinstitution | 4 |  |
Sales and Marketing Expense |  |  |
Accounting Policies [Line Items] |  |  |
Advertising and public relations costs | $ 1,300,000 | $ 300,000 | $ 500,000
Gunshot Detection Services |  |  |
Accounting Policies [Line Items] |  |  |
Percentage of contract price invoiced to customer on contract signed | 50.00% |  |
Percentage of contract price invoiced to customer on subscription service operational and ready to go live | 50.00% |  |
Percentage of contract value invoiced subscription service renewals on renewal contract executed | 100.00% |  |
Gunshot Detection Services | Adoption of Topic 606 |  |  |
Accounting Policies [Line Items] |  |  |
Revenues material right recognition period | 3 years |  |
Subscription renewal fees recognition period | 1 year |  |
Capitalized commissions, amortization period | 5 years |  |
Amortization of capitalized commissions | $ 700,000 | $ 600,000 | $ 500,000
Software License, Maintenance and Support, and Professional Services | Adoption of Topic 606 |  |  |
Accounting Policies [Line Items] |  |  |
Sales channel intermediary period of performance | 1 year |  |
Minimum |  |  |
Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives | 3 years |  |
Minimum | Customer Relationships |  |  |
Accounting Policies [Line Items] |  |  |
Estimated useful life of intangible assets | 7 years |  |
Minimum | Gunshot Detection Services |  |  |
Accounting Policies [Line Items] |  |  |
Subscription services initial contract period | 1 year |  |
Minimum | Software License, Maintenance and Support, and Professional Services | Adoption of Topic 606 |  |  |
Accounting Policies [Line Items] |  |  |
Period of service to customers | 10 years |  |
Maximum |  |  |
Accounting Policies [Line Items] |  |  |
Highly liquid investments maturity period | 3 months |  |
Property and equipment estimated useful lives | 5 years |  |
Maximum | Customer Relationships |  |  |
Accounting Policies [Line Items] |  |  |
Estimated useful life of intangible assets | 15 years |  |
Maximum | Gunshot Detection Services |  |  |
Accounting Policies [Line Items] |  |  |
Subscription services initial contract period | 3 years |  |

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