XML 40 R26.htm IDEA: XBRL DOCUMENT
v3.21.1

Stockholders Equity and StockBased Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Stockholders Equity and StockBased Compensation |
Schedule of conversions of the Series A Preferred Stock to common shares |
s of conversion |  | Preferred Shares |  |  | Common Shares |
April 16, 2019 |  |  | 27,747 |  |  |  | 2,782 |
October 8, 2019 |  |  | 28,107 |  |  |  | 2,922 |
February 10, 2020 |  |  | 11,875 |  |  |  | 1,254 |
May 15, 2020 |  |  | 17,080 |  |  |  | 1,848 |
August 31, 2020 |  |  | 16,689 |  |  |  | 1,846 |
November 30, 2020 |  |  | 12,248 |  |  |  | 1,379 |
Schedule of Warrants Outstanding |
|  | December 31, |  |  | December 31, |
Outstanding Warrants |  | 2020 |  |  | 2019 |
Issued to Investors on October 25, 2013, entitling the holders to purchase 20,833 common shares in the Company at an exercise price of $138.00 per common share up to and including April 24, 2021. In 2016, 4,954 of these warrants were exchanged for common stock, and all remaining warrant holders agreed to new warrant terms, which excluded any potential net cash settlement provisions in exchange for a reduced exercise price of $75.00 per share. |  |  | 13,665 |  |  |  | 13,665 |
Issued to Investors on November 17, 2014, entitling the holders to purchase 45,577 common shares in the Company at an exercise price of $138.60 per common share up to and including May 16, 2022. On June 30, 2016, the warrant holders agreed to new warrant terms, which excluded any potential net cash settlement provisions in order to classify them as equity in exchange for a reduced exercise price of $75.00 per share. |  |  | 45,577 |  |  |  | 45,577 |
Issued to an investment bank and subsequently transferred to a principal of the investment bank regarding the Series B Preferred Stock investment on January 30, 2018, entitling the holder to purchase 11,119 common shares in the Company at an exercise price of $18.00 per share, up to and including January 30, 2021 (warrants expired subsequent to December 31, 2020). |  |  | 11,119 |  |  |  | 11,119 |
Total |  |  | 70,361 |  |  |  | 70,361 |
Schedule for Black-Scholes pricing model |
Expected volatility |  |  | 86 | %
Risk free interest rate |  |  | 1.65 | %
Dividend yield rate |  |  | 0 | %
Weighted average years |  | 5 years |
Closing price per share – common stock |  | $ | 3.82 |
Schedule of Share-based Compensation, Stock Options, Activity |
|  | Year ended December 31, |
|  | 2020 |  |  | 2019 |
Research and development expenses |  | $ | 2,000 |  |  | $ | 398,000 |
General and administrative expenses |  |  | 51,000 |  |  |  | 425,000 |
Total stock-based compensation expense |  | $ | 53,000 |  |  | $ | 823,000 |
Schedule of Stock option transactions of the employees | Stock option transactions with employees, directors and consultants are summarized as follows for the year ended December 31, 2020:
|  | Options Outstanding |  |  | Weighted Average Exercise Price |  |  | Weighted Average Grant Date Fair Value |
Beginning of the year |  |  | 518,551 |  |  | $ | 21.99 |  |  | $ | 15.89 |
Granted |  |  | 7,634 |  |  |  | 4.45 |  |  |  | 3.28 |
Exercised |  |  | (6,548 | ) |  |  | 3.82 |  |  |  | 2.59 |
Forfeited |  |  | (1,844 | ) |  |  | 10.80 |  |  |  | 8.33 |
Expired |  |  | (1,946 | ) |  |  | 491.10 |  |  |  | 384.02 |
End of the year |  |  | 515,847 |  |  | $ | 20.23 |  |  | $ | 14.51 |
Options exercisable |  |  | 466,121 |  |  | $ | 21.35 |  |  | $ | 15.27 |
Stock option transactions with employees, directors and consultants are summarized as follows for the year ended December 31, 2019:
|  | Options Outstanding |  |  | Weighted Average Exercise Price |  |  | Weighted Average Grant Date Fair Value |
Beginning of the year |  |  | 467,013 |  |  | $ | 32.64 |  |  | $ | 23.52 |
Fraction option shares to options holders due to the one-for-twelve reverse stock split on October 21, 2019 |  |  | 99 |  |  |  | 32.64 |  |  |  | 23.52 |
Adjusted beginning of the year |  |  | 467,112 |  |  |  | 32.64 |  |  |  | 23.52 |
Granted |  |  | 91,229 |  |  |  | 4.03 |  |  |  | 2.74 |
Exercised |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | (18,180 | ) |  |  | 34.34 |  |  |  | 25.56 |
Expired |  |  | (21,610 | ) |  |  | 167.52 |  |  |  | 116.81 |
End of the year |  |  | 518,551 |  |  | $ | 21.99 |  |  | $ | 15.89 |
Options exercisable |  |  | 433,678 |  |  | $ | 24.19 |  |  | $ | 17.39 |
Schedule of Non-Vested Options, Activity |
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Fair Value Grant Date |
Non-vested – December 31, 2018 |  |  | 139,085 |  |  | $ | 10.92 |  |  | $ | 6.48 |
Fraction option shares to non-vested options holders due to the one-for-twelve reverse stock split on October 21, 2019 |  |  | 8 |  |  |  | 10.92 |  |  |  | 6.48 |
Adjusted non-vested – December 31, 2018 |  |  | 139,093 |  |  |  | 10.92 |  |  |  | 6.48 |
Granted |  |  | 91,229 |  |  |  | 4.03 |  |  |  | 2.74 |
Vested |  |  | (145,449 | ) |  |  | 6.65 |  |  |  | 4.91 |
Forfeited |  |  | — |  |  |  | — |  |  |  | — |
Non-vested – December 31, 2019 |  |  | 84,873 |  |  |  | 10.73 |  |  |  | 5.15 |
Granted |  |  | 7,634 |  |  |  | 4.45 |  |  |  | 3.28 |
Vested |  |  | (41,552 | ) |  |  | 10.80 |  |  |  | 8.29 |
Forfeited |  |  | (1,229 | ) |  |  | 10.80 |  |  |  | 8.33 |
Non-vested – December 31, 2020 |  |  | 49,726 |  |  |  | 9.71 |  |  |  | 7.44 |
Schedule of Disclosure of Share-based Compensation Arrangements by Share-based Payment Award | The following table provides certain information with respect to the above-referenced stock options that were outstanding and exercisable at December 31, 2020:
|  |  | Stock Options Outstanding |  |  | Stock Options Vested |
|  |  | Weighted |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  |
|  |  | Average |  |  |  |  |  |  |  |  | Average |  |  |  |  |  |  |
|  |  | Remaining |  |  |  |  |  | Weighted |  |  | Remaining |  |  |  |  |  | Weighted |
|  |  | Contractual |  |  | Number |  |  | Average |  |  | Contractual |  |  | Number |  |  | Average |
|  |  | Life |  |  | of |  |  | Exercise |  |  | Life |  |  | of |  |  | Exercise |
| Exercise Prices |  | -Years |  |  | Awards |  |  | Price |  |  | -Years |  |  | Awards |  |  | Price |
$ | 3.82-$12.48 |  |  | 8.16 |  |  |  | 225,179 |  |  | $ | 8.04 |  |  |  | 8.21 |  |  |  | 176,332 |  |  | $ | 7.60 |
$ | 12.49-$24.00 |  |  | 6.57 |  |  |  | 199,790 |  |  | $ | 14.19 |  |  |  | 6.56 |  |  |  | 198,911 |  |  | $ | 14.20 |
$ | 24.01-$72.00 |  |  | 4.89 |  |  |  | 65,333 |  |  | $ | 55.07 |  |  |  | 4.89 |  |  |  | 65,333 |  |  | $ | 55.07 |
$ | 72.01-$240.00 |  |  | 4.32 |  |  |  | 24,526 |  |  | $ | 75.59 |  |  |  | 4.32 |  |  |  | 24,526 |  |  | $ | 75.59 |
$ | 240.01-$331.80 |  |  | 0.23 |  |  |  | 1,019 |  |  | $ | 329.81 |  |  |  | 0.23 |  |  |  | 1,019 |  |  | $ | 329.81 |
Total |  |  | 6.93 |  |  |  | 515,847 |  |  | $ | 20.23 |  |  |  | 6.82 |  |  |  | 466,121 |  |  | $ | 21.35 |
The following table provides certain information with respect to the above-referenced stock options that were outstanding and exercisable at December 31, 2019:
|  |  | Stock Options Outstanding |  |  | Stock Options Vested |
|  |  | Weighted |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |  |  |
|  |  | Average |  |  |  |  |  |  |  |  | Average |  |  |  |  |  |  |
|  |  | Remaining |  |  |  |  |  | Weighted |  |  | Remaining |  |  |  |  |  | Weighted |
|  |  | Contractual |  |  | Number |  |  | Average |  |  | Contractual |  |  | Number |  |  | Average |
|  |  | Life |  |  | of |  |  | Exercise |  |  | Life |  |  | of |  |  | Exercise |
Exercise Prices |  | -Years |  |  | Awards |  |  | Price |  |  | -Years |  |  | Awards |  |  | Price |
$ | 3.82-$12.48 |  |  | 9.22 |  |  |  | 225,937 |  |  | $ | 8.07 |  |  |  | 9.40 |  |  |  | 143,696 |  |  | $ | 6.57 |
$ | 12.49-$24.00 |  |  | 7.57 |  |  |  | 199,790 |  |  | $ | 14.19 |  |  |  | 7.56 |  |  |  | 197,158 |  |  | $ | 14.21 |
$ | 24.01-$72.00 |  |  | 5.89 |  |  |  | 65,333 |  |  | $ | 55.07 |  |  |  | 5.89 |  |  |  | 65,333 |  |  | $ | 55.07 |
$ | 72.01-$240.00 |  |  | 5.32 |  |  |  | 24,526 |  |  | $ | 75.59 |  |  |  | 5.32 |  |  |  | 24,526 |  |  | $ | 75.59 |
$ | 240.01-$519.00 |  |  | 0.63 |  |  |  | 2,965 |  |  | $ | 435.67 |  |  |  | 0.63 |  |  |  | 2,965 |  |  | $ | 435.67 |
Total |  |  | 7.93 |  |  |  | 518,551 |  |  | $ | 21.99 |  |  |  | 7.74 |  |  |  | 433,678 |  |  | $ | 24.19 |
Summary of RSUs activity |
|  |  |  |  | Weighted |
|  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Total awards outstanding at December 31, 2019 |  |  | — |  |  | $ | — |
Total shares granted |  |  | 243,800 |  |  | $ | 2.69 |
Total shares vested |  |  | — |  |  | $ | — |
Total shares forfeited |  |  | — |  |  | $ | — |
Total unvested shares outstanding at December 31, 2020 |  |  | 243,800 |  |  | $ $2.69 |
Scheduled vesting for outstanding RSUs awards |
|  | Year Ending December 31, |
|  | 2021 |  |  | 2022 |  |  | 2023 |  |  | Total |
Scheduled vesting |  |  | 81,268 |  |  |  | 81,267 |  |  |  | 81,265 |  |  |  | 243,800 |

X
- References No definition available. + Details
Name: | ltbr_ScheduleForBlackScholesPricingModeltabletextblock
Namespace Prefix: | ltbr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_ScheduleOfNonvestedSharesActivityTableTextBlock
Namespace Prefix: | ltbr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_ScheduleOfStockOptionTransactionsOfEmployeesTableTextBlock
Namespace Prefix: | ltbr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ltbr_ScheduledVestingForOutstandingRsusAwardstextblock
Namespace Prefix: | ltbr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the changes in outstanding nonvested 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: 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) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21553-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65877616&loc=d3e177068-122764 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21488-112644 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21484-112644 Reference 14: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_ScheduleOfStockByClassTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
Name: | us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration