XML 65 R51.htm IDEA: XBRL DOCUMENT
v3.21.1

Stockholders Equity and StockBased Compensation (Details 5) - Options Held [Member] - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Shares, non-vested, beginning | 84,873 | 139,085
Fraction option shares to non-vested options holders due to the one-for-twelve reverse stock split on October 21, 2019 |  | 8
Adjusted non-vested - December 31, 2018 |  | 139,093
Shares, Granted | 7,634 | 91,229
Shares, vested | (41,552) | (145,449)
Shares, Forfeited | (1,229) |
Shares, non-vested, end of period | 49,726 | 84,873
Weighted average exercise price, Beginning | $ 10.73 | $ 10.92
Weighted Average Exercise Price, Fraction option shares to non-vested options holders due to the one-for-twelve reverse stock split on October 21, 2019 |  | 10.92
Weighted Average Exercise Price, Adjusted non-vested - December 31, 2018 |  | 10.92
Weighted average exercise price, granted | 4.45 | 4.03
Weighted average exercise price, vested | 10.80 | 6.65
Weighted average exercise price, forfeited | 10.80 | 0.00
Weighted average exercise price, end of period | 9.71 | 10.73
Weighted average fair value grant date, Fraction option shares to non-vested options holders due to the one-for-twelve reverse stock split on October 21, 2019 |  | 6.48
Weighted average fair value grant date, Adjusted non-vested - December 31, 2018 |  | 6.48
Weighted average fair value grant date, beginning | 5.15 | 6.48
Weighted average fair value grant date, granted | 3.28 | 2.74
Weighted average fair value grant date, vested | 8.29 | 4.91
Weighted average fair value grant date, forfeited | 8.33 | 0.00
Weighted average fair value grant date, end of period | $ 7.44 | $ 5.15

X
- References No definition available. + Details
Name: | ltbr_AdjustedNonVestedDecember312018
Namespace Prefix: | ltbr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_FractionOptionSharesToNonVestedOptionsHoldersDueToTheOneForTwelveReverseStockSplitOnOctober212019
Namespace Prefix: | ltbr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageExercisePriceForfeited
Namespace Prefix: | ltbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageExercisePriceVested
Namespace Prefix: | ltbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_WeightedAverageExercisePriceAdjustedNonVestedDecember312018
Namespace Prefix: | ltbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_WeightedAverageExercisePriceFractionOptionSharesToNonVestedOptionsHoldersDueToTheOneForTwelveReverseStockSplitOnOctober212019
Namespace Prefix: | ltbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_WeightedAverageFairValueGrantDateAdjustedNonVestedDecember312018
Namespace Prefix: | ltbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_WeightedAverageFairValueGrantDateFractionOptionSharesToNonVestedOptionsHoldersDueToTheOneForTwelveReverseStockSplitOnOctober212019
Namespace Prefix: | ltbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of non-vested options outstanding. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of non-vested options forfeited. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of options vested. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + 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 (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_OptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |