Summary of Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Unrealized gain (Loss) on short term investments			$ 4,000		$ (2,000)
Accounts receivable, percentage			10.00%		35.00%
Allowance for doubtful accounts			$ 0		$ 0
Deferred revenue	$ 449,000		$ 449,000		$ 248,000
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| No Customer [Member]
Concentration Risk, Percentage	11.00%	33.00%	10.00%	37.00%
Additional Paid In Capital [Member]
Deferred offering costs	$ 3,200,000		$ 3,200,000

Accounts receivable, Percentage.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period.

+ References

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Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.

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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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Amount of unrealized gain (loss) on investment.

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