Segment Reporting and Concentrations - Additional Information (Details) - Customer	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segment Reporting [Abstract]
Number of Customers Accounting for More than 10 Percent of Revenue	1	2	1	2
Number Of Customers With Significant Accounts Receivable Balance	2		2		2

Number of Customers Accounting for More than 10 Percent of Revenue

No definition available.

Name:	falc_NumberofCustomersAccountingforMorethan10PercentofRevenue
Namespace Prefix:	falc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration