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v3.24.1.1.u2

SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) segment financial_institution | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Product Information [Line Items] |  |  |  |
Goodwill, impairment charges | $ 0 | $ 0 |  |
Intangible assets, impairment charges | 0 | 0 |  |
Capitalized software development costs, impairment charges | 0 | 0 |  |
Advertising costs | 78,000 | $ 199,000 |  |
Equity awards liability | 0 |  | $ 4,000 |
Deferred revenue | 1,469,000 |  | 2,209,000 | $ 906,000
Revenue recognized |  |  | 555,000 |
Noncurrent deferred revenue balance | 0 |  | 0 |
Accounts receivable, net of allowance for doubtful accounts | 2,744,000 |  | 4,703,000 |
Accounts receivable, allowance for doubtful accounts | $ 85,000 |  | 69,000 |
Number of financial institutions | financial_institution | 2 |  |  |
Number of reportable segments | segment | 1 |  |  |
Number of operating segments | segment | 1 |  |  |
Three Customers | Revenue from Contract with Customer Benchmark | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 44.00% | 39.00% |  |
Three Customers | Accounts Receivable | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent |  | 54.00% |  |
Customer One | Revenue from Contract with Customer Benchmark | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 19.00% | 16.00% |  |
Customer One | Accounts Receivable | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 36.00% | 28.00% |  |
Customer Two | Revenue from Contract with Customer Benchmark | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 13.00% | 13.00% |  |
Customer Two | Accounts Receivable | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 1.00% | 16.00% |  |
Customer Three | Revenue from Contract with Customer Benchmark | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 12.00% | 10.00% |  |
Customer Three | Accounts Receivable | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 7.00% | 10.00% |  |
Four Customers | Accounts Receivable | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 56.00% |  |  |
Customer Four | Accounts Receivable | Customer Concentration Risk |  |  |  |
Product Information [Line Items] |  |  |  |
Business concentration risk, percent | 12.00% |  |  |
Fair Value, Inputs, Level 1 |  |  |  |
Product Information [Line Items] |  |  |  |
Cash, cash equivalents and short-term investments | $ 9,239,000 |  | 8,980,000 |
Fair Value, Inputs, Level 2 |  |  |  |
Product Information [Line Items] |  |  |  |
Equity awards liability | $ 0 |  | $ 4,000 |
Retirement Savings 401k Plan |  |  |  |
Product Information [Line Items] |  |  |  |
Retirement plan, maximum employee contribution, percent | 35.00% |  |  |
Retirement plan, employer matching contribution, percent of match | 50.00% |  |  |
Retirement plan, employer matching contribution, percent of employees' gross pay | 6.00% |  |  |
Retirement plan, matching contributions | $ 0 | $ 27,000 |  |
Minimum |  |  |  |
Product Information [Line Items] |  |  |  |
Property and equipment, useful life | 3 years |  |  |
Maximum |  |  |  |
Product Information [Line Items] |  |  |  |
Property and equipment, useful life | 7 years |  |  |

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