XML 24 R18.htm IDEA: XBRL DOCUMENT
v3.25.3

Warrants | 9 Months Ended
--- | ---
Sep. 30, 2025
Warrants and Rights Note Disclosure [Abstract] |
Warrants | Note 10 – Warrants The Company issued warrants to OC III LFE II LP (“OC III LFE”) and various affiliates of OC III LFE (collectively, the “Warrantholder”) in previous years to purchase a number of shares of Common Stock equal to 23% (the “2020 Warrant”), 5% (the “2021 Warrant”), and 5% (the “2022 Warrant”) of the outstanding Common Stock (after giving effect to such issuance) on a fully-diluted basis at the time the warrants are exercised. The 2020 Warrant, 2021 Warrant, and 2022 Warrant each have a per share exercise price of $0.01 and a term of ten (10) years from date of issuance. The 2020 Warrant, issued in November 2020, was exercisable for an aggregate of 9,609,116 and 9,626,968 shares of Common Stock as of September 30, 2025 and December 31, 2024, respectively. The 2021 Warrant, issued in December 2021, was exercisable for an aggregate of 2,088,938 and 2,092,819 shares of Common Stock as of September 30, 2025 and December 31, 2024, respectively. The 2022 Warrant, issued in April 2022, was exercisable for an aggregate of 2,088,938 and 2,092,819 shares of Common Stock as of September 30, 2025 and December 31, 2024, respectively. The Company also issued a warrant to the Warrantholder in May 2023 to purchase an aggregate of 1,636,313 shares of Common Stock (the “2023 Warrant”), exercisable for a term of ten (10) years from date of issuance with a per share exercise price of $3.57. The 2020 Warrant, 2021 Warrant, 2022 Warrant and 2023 Warrant are collectively referred to herein as the “Warrant”. As of September 30, 2025, the Warrant is classified as a liability and subject to fair value remeasurement at each balance sheet date. The fair value of the Warrant as of September 30, 2025 and December 31, 2024 was $148,650 and $136,319, respectively. The change in fair value of the Warrant is reported on a separate line in the condensed consolidated statements of operations.

X
- Definition Warrant Disclosure [Text Block] + References No definition available. + Details
Name: | rail_WarrantDisclosureTextBlock
Namespace Prefix: | rail_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsNoteDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration