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 ($)								1 Months Ended					3 Months Ended		9 Months Ended		12 Months Ended
Stockholders' Equity (Narrative) (Details) - USD ($)	Oct. 19, 2015	Aug. 12, 2015	Apr. 09, 2015	Apr. 08, 2015	Nov. 12, 2014	Sep. 03, 2014	May. 05, 2014	Aug. 31, 2015	Jul. 31, 2015	Jun. 30, 2015	May. 31, 2015	Apr. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Sep. 04, 2015
Common Stock, Shares Authorized													500,000,000	500,000,000	500,000,000	500,000,000	500,000,000
Common Stock, Shares, Outstanding													18,523,453	15,204,358	18,523,453	15,204,358	18,082,874
Class of Warrant or Right, Outstanding													4,886,764	2,152,174	4,886,764	2,152,174
Number of options outstanding													3,521,831	2,143,686	3,521,831	2,143,686	2,026,564	1,564,257
Number of options vested and expected to vest outstanding													2,476,159		2,476,159		1,564,257
Aggregate intrinsic value													$ 0		$ 0		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value													$ 0.83		$ 0.83		$ 1.55
Restricted stock grants estimated forfeiture amount													1.50%		1.50%
Share based compensation															$ 1,017,449	$ 227,274
Common Stock issued													18,523,453		18,523,453		18,082,874
Proceeds from Issuance of Common Stock															$ 55,131	305,490
Amount allocated from the Offering to warrants															$ 0			$ 4,416,000
Volitility rate															86.76%		90.44%
Risk-free interest rate															1.48%		1.68%
Dividend yield															0.00%		0.00%
Expected term															5 years 4 months 24 days		5 years
Stock options granted															1,609,674		579,429
Fair value of stock options granted																	$ 10.61	$ 10.61
Approximations [Member]
Stock option expense													$ 235,000	$ 102,000	$ 1,017,000	$ 227,000
Chief Executive Officer [Member]
Non-qualified stock options															1,277,754
Issuance of 2,731,900 non-qualified 5-10 year options [Member]
Non-qualified stock options															2,994,703
Lower Limit															$ 0.83
Upper Limit															$ 23.85
Issuance of 258,111 non-qualified 5-10 year options [Member]
Non-qualified stock options															271,926
Lower Limit															$ 1.26
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
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	1,117,178	1,117,178	1,117,178
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
2015 Equity Incentive Plan [Member]
Common Stock, Shares Authorized													3,000,000		3,000,000
Shares of Common Stock limit on stock options															250,000
2015 Equity Incentive Plan [Member] \| Directors [Member]
Contractural lives				10 years
Volitility rate		87.35%		86.00%
Risk-free interest rate		1.61%		1.46%
Expected term				5 years 6 months
Strike Price				$ 1.26
Fair value of stock options granted		$ 0.71		$ 0.88									$ 0.39		$ 0.39
Pre-vesting forfeiture rate				1.50%
Expected dividends				$ 0
2015 Short-Term Non-Qualified Option Grants [Member]
Non-qualified stock options								1,536	1,812	1,310	1,775	2,981			1,803
Contractural lives				10 years
Lower Limit				$ 0.76
Upper Limit				$ 0.86
Expected term				5 years
Strike Price				$ 1.26
Expected dividends				$ 0
2015 Long-Term Incentive Option Grants [Member] \| Employees and Consultants [Member]
Contractural lives				10 years
Volitility rate		87.50%		87.00%
Risk-free interest rate		1.70%		1.55%
Expected term				6 years
Strike Price				$ 1.26
Stock options granted		89,584
Fair value of stock options granted		$ 0.74		$ 0.91
Fair market value on measurement date		$ 0.55
Pre-vesting forfeiture rate				1.50%
Expected dividends				$ 0
Stock options granted				550,972
2015 Long-Term Incentive Option Grants [Member] \| Directors [Member]
Non-qualified stock options		23,024		112,996
Equity Purchase Agreement [Member]
Equity Issuance, Per Share Amount															$ 0.92
Common stock purchase amount, per business day													100,000		100,000
Common stock purchase amount, per business day, value													$ 250,000		$ 250,000
Percentage of aggregate shares of the Company's common stock to be purchased													30.00%		30.00%
Percentage of purchase price per share, pursuant to VWAP													95.00%		95.00%
Stock issued for compensation for commitment, shares															300,000
Stock issued for compensation for commitment, amount															$ 276,000
ATM Offering [Member]
Common Stock issued	99,934												140,579		140,579
Proceeds from Issuance of Common Stock	$ 116,000														$ 155,000
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						$ 306,000
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							$ 0.58
Pre-vesting forfeiture rate							1.50%
Minimum [Member]
Strike Price															$ 0.83
Minimum [Member] \| Chief Executive Officer [Member]
Contractural lives															2 months 12 days
Minimum [Member] \| Directors, Officers and Employees [Member]
Contractural lives															9 months 18 days
Minimum [Member] \| Issuance of 2,731,900 non-qualified 5-10 year options [Member]
Contractural lives															10 years
Minimum [Member] \| Issuance of 258,111 non-qualified 5-10 year options [Member]
Contractural lives															10 years
Minimum [Member] \| November 12, 2014 Offering [Member]
Maximum common stock ownership to be eligible for exercise of warrants					4.99%
Minimum [Member] \| 2015 Short-Term Non-Qualified Option Grants [Member]
Risk-free interest rate				1.37%
Dividend yield				86.00%
Strike Price				$ 1.12
Maximum [Member]
Strike Price															$ 0.98
Maximum [Member] \| Chief Executive Officer [Member]
Contractural lives															9 years 10 months 24 days
Maximum [Member] \| Directors, Officers and Employees [Member]
Contractural lives															10 years
Maximum [Member] \| Issuance of 2,731,900 non-qualified 5-10 year options [Member]
Contractural lives															5 years
Maximum [Member] \| Issuance of 258,111 non-qualified 5-10 year options [Member]
Contractural lives															5 years
Maximum [Member] \| November 12, 2014 Offering [Member]
Maximum common stock ownership to be eligible for exercise of warrants					19.99%
Maximum [Member] \| 2015 Short-Term Non-Qualified Option Grants [Member]
Risk-free interest rate				1.63%
Dividend yield				88.00%
Strike Price				$ 1.23
Maximum [Member] \| Equity Purchase Agreement [Member]
Common stock, purchase commitment amount																			$ 10,000,000
Maximum [Member] \| ATM Offering [Member]
Total fundraising limit													$ 478,500		$ 478,500
Remainder [Member] \| ATM Offering [Member]
Total fundraising limit													$ 207,000		$ 207,000
Stock and Stock Equivalents [Member]
Common Stock, Shares, Outstanding													26,932,048	19,500,218	26,932,048	19,500,218
Stock-based compensation [Member] \| Approximations [Member]
Share based compensation													$ 200,000	$ 100,000	$ 1,000,000	$ 200,000
2006 Stock Plan [Member] \| 2015 Short-Term Non-Qualified Option Grants [Member]
Non-qualified stock options			47,017
2006 Stock Plan [Member] \| 2015 Short-Term Non-Qualified Option Grants [Member] \| Employees and Consultants [Member]
Non-qualified stock options				463,192
2015 Equity Incentive Plan [Member]
Non-qualified stock options		158,859
Strike Price		$ 1.26
2015 Equity Incentive Plan [Member] \| 2015 Short-Term Non-Qualified Option Grants [Member]
Non-qualified stock options			3,968
2015 Equity Incentive Plan [Member] \| 2015 Short-Term Non-Qualified Option Grants [Member] \| Employees and Consultants [Member]
Non-qualified stock options				148,845