XML 119 R99.htm IDEA: XBRL DOCUMENT v3.22.1

Stock-Based Compensation (Valuation Assumptions, Options) (Details) - Time-Vested Stock Options [Member]	12 Months Ended
	Dec. 31, 2021 $ / shares
1/28/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Jan. 28, 2021
Expected Life	6 years
Expected Volatility	64.75%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	0.55%
Fair Value Per Award	$ 2.21
2/15/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Feb. 15, 2021
Expected Life	6 years
Expected Volatility	64.89%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	0.64%
Fair Value Per Award	$ 2.31
4/19/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Apr. 19, 2021
Expected Life	6 years
Expected Volatility	70.34%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	1.00%
Fair Value Per Award	$ 3.48
01/5/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	May 10, 2021
Expected Life	6 years
Expected Volatility	71.78%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	0.97%
Fair Value Per Award	$ 4.38
5/24/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	May 24, 2021
Expected Life	6 years
Expected Volatility	72.58%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	0.98%
Fair Value Per Award	$ 3.55
7/29/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Jul. 29, 2021
Expected Life	6 years
Expected Volatility	74.05%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	0.84%
Fair Value Per Award	$ 3.41
8/02/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Aug. 02, 2021
Expected Life	6 years
Expected Volatility	74.06%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	0.77%
Fair Value Per Award	$ 3.27
08/30/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Aug. 30, 2021
Expected Life	6 years
Expected Volatility	73.90%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	0.87%
Fair Value Per Award	$ 3.40
09/29/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Sep. 29, 2021
Expected Life	6 years
Expected Volatility	73.98%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	1.12%
Fair Value Per Award	$ 2.93
10/18/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Oct. 18, 2021
Expected Life	6 years
Expected Volatility	73.91%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	1.25%
Fair Value Per Award	$ 2.84
11/1/2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2021
Grant Date	Nov. 01, 2021
Expected Life	6 years
Expected Volatility	73.88%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	1.28%
Fair Value Per Award	$ 2.89

X

- Definition

Grant date.

+ References

No definition available.

+ Details

Name:	rail_GrantDate
Namespace Prefix:	rail_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Grant year.

+ References

No definition available.

+ Details

Name:	rail_GrantYear
Namespace Prefix:	rail_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Fair Value Per Award

+ References

No definition available.

+ Details

Name:	rail_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFairValuePerAward
Namespace Prefix:	rail_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=rail_TimeVestedStockOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateDMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateEMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateGMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateJMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardDateAxis=rail_GrantDateKMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: