Series A Redeemable Convertible Preferred Stock - Probability and Volatility Assumptions (Details)	6 Months Ended
Jun. 30, 2022
Equity [Abstract]
Probability of redemption as part of a fundamental sale transaction	0.50%
Probability of redemption absent a fundamental sale transaction	4.75%
Annual volatility	65.00%

Probability of Redemption Absent a Fundamental Sale Transaction, Percent

No definition available.

Name:	falc_ProbabilityofRedemptionAbsentaFundamentalSaleTransactionPercent
Namespace Prefix:	falc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration