Lightbridge Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Narrative) (Details)

Stockholders' Equity (Narrative) (Details) (USD $)	12 Months Ended		6 Months Ended		1 Months Ended		12 Months Ended
Stockholders' Equity (Narrative) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jul. 22, 2010	Oct. 21, 2013	Dec. 31, 2011	Dec. 31, 2012	Jul. 17, 2006
Common Stock, Shares Authorized	500,000,000us-gaap_CommonStockSharesAuthorized	500,000,000us-gaap_CommonStockSharesAuthorized	500,000,000us-gaap_CommonStockSharesAuthorized	500,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, Shares, Outstanding	18,082,874us-gaap_CommonStockSharesOutstanding	15,057,243us-gaap_CommonStockSharesOutstanding	18,082,874us-gaap_CommonStockSharesOutstanding	15,057,243us-gaap_CommonStockSharesOutstanding
Class of Warrant or Right, Outstanding	4,886,764	2,284,996	4,886,764	2,284,996
Number of options outstanding	2,026,564	1,564,257	2,026,564	1,564,257				1,639,842
Number of options vested and expected to vest outstanding	1,564,257	1,530,200	1,564,257	1,530,200
Aggregate intrinsic value	$ 0	$ 0	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value	$ 1.55	$ 1.45	$ 1.55	$ 1.45
Unrecognized compensation costs	0ltbr_UnrecognizedCompensationCosts	19,000ltbr_UnrecognizedCompensationCosts	0ltbr_UnrecognizedCompensationCosts	19,000ltbr_UnrecognizedCompensationCosts
Restricted stock grants estimated forfeiture amount	1.50%		1.50%
Share based compensation	282,275us-gaap_ShareBasedCompensation	329,499us-gaap_ShareBasedCompensation
Common Stock issued	18,082,874us-gaap_CommonStockSharesIssued	15,057,243us-gaap_CommonStockSharesIssued	18,082,874us-gaap_CommonStockSharesIssued	15,057,243us-gaap_CommonStockSharesIssued
Proceeds from Issuance of Common Stock	4,753,326	3,958,040
Stock options granted	579,429	0
Fair value of stock options granted		$ 10.61		$ 10.61				$ 10.85
Approximations [Member]
Stock option expense	262,000	225,000	55,000	37,000
Share based compensation	300,000
Chief Executive Officer [Member]
Non-qualified stock options	820,396
Issuance of 255,202 non-qualified 10 year options [Member]
Non-qualified stock options	255,202
Contractural lives	10 years
Lower Limit	$ 4.50
Upper Limit	$ 14.40
Registered Direct Offering and Outstanding Warrants [Member]
Equity Issuance, Per Share Amount	$ 2.30
Common Stock issued	132,822		132,822
Proceeds from Issuance of Common Stock	305,931
Common stock and warrants sold	2,500,000				2,069,992
Common stock to be purchased in the Offering	1,250,000		1,250,000		1,034,996
Exercisable term	7 years 6 months
Shares of common stock to be purchased by fixed combination	0.5		0.5		0.5
Purchase price of fixed combination	1.75		1.75		6.60
Warrant exercise price	$ 2.30				$ 9.00
Registered Direct Offering and Outstanding Warrants [Member] \| Approximations [Member]
Proceeds from Issuance of Common Stock	4,400,000				13,700,000
Net proceeds from the Offering received after payments of fees and expenses	4,000,000		4,000,000
Amount allocated from the Offering to common stock	2,800,000
Amount allocated from the Offering to warrants	1,200,000
Risk-free interest rate	2.01%
May 5, 2014 Stock Options Granted [Member]
Volitility rate	90.44%
Risk-free interest rate	1.68%
Dividend yield	0.00%
Expected term	5 years
Strike Price	$ 2.55
Stock options granted	579,429
Fair value of stock options granted	$ 1.79		$ 1.79
Fair market value on measurement date	$ 0.93		$ 0.93
Pre-vesting forfeiture rate	1.50%		1.50%
Issuance of 1,579,415 non-qualified 5-10 year options [Member]
Non-qualified stock options	1,579,415
Lower Limit	$ 2.55
Upper Limit	$ 23.85
Issuance of 191,947 non-qualified 5-10 year options [Member]
Non-qualified stock options	191,947
Lower Limit	$ 2.55
Upper Limit	$ 15.30
November 12, 2014 Offering [Member]
Proceeds from Issuance of Common Stock						5,000,000
Common stock and warrants sold						2,878,516
Common stock to be purchased in the Offering						2,734,590
Shares of common stock to be purchased by fixed combination						0.95
Purchase price of fixed combination						1.75
Warrant exercise price						$ 2.31
November 12, 2014 Offering [Member] \| Approximations [Member]
Net proceeds from the Offering received after payments of fees and expenses						4,500,000
Amount allocated from the Offering to common stock	2,700,000
Amount allocated from the Offering to warrants	1,800,000
Issued to Investors on July 28, 2010 [Member]
Class of Warrant or Right, Outstanding	1,034,996	1,034,996	1,034,996	1,034,996
Common stock to be purchased in the Offering	1,034,996		1,034,996
Warrant exercise price	$ 9.00
Issued to Investors on October 25, 2013 [Member]
Class of Warrant or Right, Outstanding	1,117,178	1,250,000	1,117,178	1,250,000
Common stock to be purchased in the Offering	1,250,000		1,250,000
Warrant exercise price	$ 2.30
Issued to Investors on November 17, 2014 [Member]
Class of Warrant or Right, Outstanding	2,734,590	0	2,734,590	0
Common stock to be purchased in the Offering	2,734,590		2,734,590
Warrant exercise price	$ 2.31
Minimum [Member] \| Chief Executive Officer [Member]
Contractural lives	0 years 10 months 24 days
Minimum [Member] \| Directors, Officers and Employees [Member]
Contractural lives	1 year 7 months 6 days
Minimum [Member] \| Registered Direct Offering and Outstanding Warrants [Member]
Maximum common stock ownership to be eligible for exercise of warrants	4.99%		4.99%		4.99%
Minimum [Member] \| Issuance of 1,579,415 non-qualified 5-10 year options [Member]
Contractural lives	5 years
Minimum [Member] \| Issuance of 191,947 non-qualified 5-10 year options [Member]
Contractural lives	5 years
Minimum [Member] \| November 12, 2014 Offering [Member]
Maximum common stock ownership to be eligible for exercise of warrants						4.99%
Maximum [Member] \| Chief Executive Officer [Member]
Contractural lives	6 years 2 months 12 days
Maximum [Member] \| Directors, Officers and Employees [Member]
Contractural lives	6 years 3 months 18 days
Maximum [Member] \| Registered Direct Offering and Outstanding Warrants [Member]
Maximum common stock ownership to be eligible for exercise of warrants	9.99%		9.99%		9.99%
Maximum [Member] \| Issuance of 1,579,415 non-qualified 5-10 year options [Member]
Contractural lives	10 years
Maximum [Member] \| Issuance of 191,947 non-qualified 5-10 year options [Member]
Contractural lives	10 years
Maximum [Member] \| November 12, 2014 Offering [Member]
Maximum common stock ownership to be eligible for exercise of warrants						19.99%
Maximum number of shares in respect to stock options [Member]
Common Stock, Capital Shares Reserved for Future Issuance									266,667
Employee Stock Option [Member]
Volitility rate	90.44%						94.32%
Risk-free interest rate	1.68%						3.35%
Dividend yield	0.00%						0.00%
Expected term	5 years						10 years
Stock and Stock Equivalents [Member]
Common Stock, Shares, Outstanding	24,996,202		24,996,202
Stock Compensation Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance									2,500,000
Maximum restricted shares granted [Member]
Common Stock, Capital Shares Reserved for Future Issuance									1,250,000
Maximum restricted shares granted to one person [Member]
Common Stock, Capital Shares Reserved for Future Issuance									166,667
Stock-based compensation [Member] \| Approximations [Member]
Share based compensation	$ 300,000
Restricted Stock [Member]
Unvested Shares								43,032
Restricted stock grants estimated forfeiture amount	0.00%		0.00%
Warrants [Member]
Class of Warrant or Right, Outstanding	1,117,178		1,117,178
Volitility rate	104.00%
Dividend yield	0.00%
Expected term	7 years 6 months
Warrants [Member] \| November 12, 2014 Offering [Member]
Volitility rate	67.00%
Risk-free interest rate	2.07%
Dividend yield	0.00%
Expected term	7 years 6 months