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Restatement of Previously Issued Consolidated Financial Statements - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2021
Minimum cash balance required by lender | $ 3,000 | $ 3,000 | $ 3,000
Loan proceeds related to the Paycheck Protection Program Loan | 8,407 |  | 10,435
Allowance for uncollectible receivables | 249 | 188 | $ 242
Losses due to impairment of long-lived assets | 611 | 1,051 |
Advertising costs | 2,242 | $ 3,716 |
As Filed |  |  |
Allowance for uncollectible receivables | $ 455 |  |

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