Lightbridge Corporation and Summary of Significant Accounting Policies Nature Of Operations (Narrative) (Details) (USD $)
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6 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||||||||
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Jun. 30, 2012
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Dec. 31, 2011
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Jun. 30, 2011
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Dec. 31, 2010
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Jun. 30, 2012
Approximations [Member]
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Jun. 30, 2011
Approximations [Member]
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Jun. 30, 2012
Approximations [Member]
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Jun. 30, 2011
Approximations [Member]
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Dec. 31, 2011
Approximations [Member]
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Jun. 30, 2012
Doubleline Total Return Bond Fund [Member]
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Dec. 31, 2011
Doubleline Total Return Bond Fund [Member]
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Jun. 30, 2012
Vanguard Wellesley Income Fund [Member]
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Dec. 31, 2011
Vanguard Wellesley Income Fund [Member]
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Jun. 30, 2012
Vanguard High Yield Corp Investor Fund [Member]
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Dec. 31, 2011
Vanguard High Yield Corp Investor Fund [Member]
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Jun. 30, 2012
Vanguard GNMA Investor Fund [Member]
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Dec. 31, 2011
Vanguard GNMA Investor Fund [Member]
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Jun. 30, 2012
Vanguard Short Term Investment Grade Investor [Member]
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Dec. 31, 2011
Vanguard Short Term Investment Grade Investor [Member]
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Power output increase based on future potential revenues | 17.00% | ||||||||||||||||||
Maximum increase in power output based on future revenue | 30.00% | ||||||||||||||||||
Stock based compensation | $ 300,000 | $ 300,000 | $ 600,000 | $ 800,000 | |||||||||||||||
Federally insured cash limit | 250,000 | ||||||||||||||||||
Cash and Cash Equivalents, at Carrying Value | 827,486 | 3,569,098 | 1,294,332 | 2,373,421 | 800,000 | 800,000 | 3,600,000 | ||||||||||||
Restricted Cash | 800,000 | 800,000 | 600,000 | ||||||||||||||||
Marketable Securities | 5,000,000 | 5,000,000 | 5,200,000 | ||||||||||||||||
Mutual Funds | 1,000,000 | 1,000,000 | 1,200,000 | 1,300,000 | 1,300,000 | 1,300,000 | 800,000 | 800,000 | 700,000 | 800,000 | |||||||||
Unrealized Gain (Loss) on Securities | 0 | 0 | 100,000 | 100,000 | |||||||||||||||
Cost basis of investments | 4,800,000 | 4,800,000 | 5,100,000 | ||||||||||||||||
Unrealized gain loss from financial institutions | 100,000 | 100,000 | 200,000 | 200,000 | |||||||||||||||
Valuation allowance | 100.00% | ||||||||||||||||||
More likely than not threshold | 50.00% | ||||||||||||||||||
Research and development costs | $ 500,000 | $ 500,000 | $ 1,000,000 | $ 1,100,000 |