Lightbridge Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Narrative) (Details)

Stockholders' Equity (Narrative) (Details) - USD ($)				1 Months Ended		3 Months Ended		12 Months Ended
Stockholders' Equity (Narrative) (Details) - USD ($)	Nov. 12, 2014	Sep. 03, 2014	May. 05, 2014	Oct. 21, 2013	Jul. 22, 2010	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Jul. 17, 2006
Common Stock, Shares Authorized						500,000,000		500,000,000
Common Stock, Shares, Outstanding						18,082,874		18,082,874
Class of Warrant or Right, Outstanding						4,886,764	2,284,996
Number of options outstanding						1,912,157		2,026,564	1,564,257
Number of options vested and expected to vest outstanding						1,449,850		1,564,257
Aggregate intrinsic value						$ 0			$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value						$ 1.24		$ 1.55
Restricted stock grants estimated forfeiture amount						1.50%
Share based compensation						$ 81,680	$ 59,796
Common Stock issued						18,082,874		18,082,874
Amount allocated from the Offering to warrants						$ 0			$ 4,416,000
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 options granted						0		579,429
Fair value of stock options granted								$ 10.61	$ 10.61
Approximations [Member]
Stock option expense						$ 81,681	$ 40,150
Share based compensation						$ 100,000
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
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	1,034,996
Exercisable term				7 years 6 months
Shares of common stock to be purchased by fixed combination				0.5	0.5
Purchase price of fixed combination				$ 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
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
Fair market value on measurement date			$ 0.69
Pre-vesting forfeiture rate			1.50%
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
Issuance of 1,465,008 non-qualified 5-10 year options [Member]
Non-qualified stock options						1,465,008
Lower Limit						$ 2.55
Upper Limit						$ 23.85
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
Issued to Investors on July 28, 2010 [Member]
Class of Warrant or Right, Outstanding						1,034,996	1,034,996
Common stock to be purchased in the Offering						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
Common stock to be purchased in the Offering						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
Common stock to be purchased in the Offering						2,734,590
Warrant exercise price						$ 2.31
Minimum [Member] \| Chief Executive Officer [Member]
Contractural lives						8 months 12 days
Minimum [Member] \| Directors, Officers and Employees [Member]
Contractural lives						1 year 3 months 18 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%
Minimum [Member] \| Issuance of 191,947 non-qualified 5-10 year options [Member]
Contractural lives						5 years
Minimum [Member] \| Issuance of 1,465,008 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
Maximum [Member] \| Directors, Officers and Employees [Member]
Contractural lives						6 years
Maximum [Member] \| Registered Direct Offering and Outstanding Warrants [Member]
Maximum common stock ownership to be eligible for exercise of warrants				9.99%	9.99%
Maximum [Member] \| Issuance of 191,947 non-qualified 5-10 year options [Member]
Contractural lives						10 years
Maximum [Member] \| Issuance of 1,465,008 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
Stock and Stock Equivalents [Member]
Common Stock, Shares, Outstanding						24,881,795
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						$ 100,000		$ 100,000
Restricted Stock [Member]
Restricted stock grants estimated forfeiture amount						0.00%