Marketable Securities (Details) (USD $) | 3 Months Ended |
Mar. 31, 2014 |
Security |
Schedule of Available-for-sale Securities [Line Items] | ' |
Amortized Cost Basis | $485,000 |
Unrealized Loss | -1,000 |
Fair Value | 484,000 |
Amortized Cost Basis Rollforward | ' |
Marketable securities as of March 31, 2014 | 485,000 |
Unrealized Gain (Loss) Rollforward | ' |
Marketable securities as of December 31, 2013 | -3,000 |
Sales of securities | 0 |
Increase in fair value of marketable securities | 2,000 |
Marketable securities as of March 31, 2014 | -1,000 |
Fair Value Rollforward | ' |
Increase in fair value of marketable securities | 2,000 |
Marketable securities as of March 31, 2014 | 484,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 273,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 273,000 |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] | ' |
Due within one year | 15,000 |
Due after one year through five years | 332,000 |
Due after five years through ten years | 138,000 |
Due after ten years | 0 |
Amortized Cost Basis | 485,000 |
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] | ' |
Due within one year | 15,000 |
Due after one year through five years | 331,000 |
Due after five years through ten years | 138,000 |
Due after ten years | 0 |
Fair Value | 484,000 |
Number of Securities Sold | 12 |
Unrealized (loss) | ' |
Fair Value Rollforward | ' |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | -3,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | -3,000 |
Amortized Cost | ' |
Schedule of Available-for-sale Securities [Line Items] | ' |
Amortized Cost Basis | 485,000 |
Amortized Cost Basis Rollforward | ' |
Marketable securities as of December 31, 2013 | 463,000 |
Face value of marketable securities acquired | 115,000 |
Discounts on purchase of marketable securities, net of acquisition costs | -1,000 |
Amortization on marketable securities | -1,000 |
Sales of securities | 91,000 |
Marketable securities as of March 31, 2014 | 485,000 |
Fair Value Rollforward | ' |
Face value of marketable securities acquired | 115,000 |
Discounts on purchase of marketable securities, net of acquisition costs | -1,000 |
Amortization on marketable securities | -1,000 |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] | ' |
Amortized Cost Basis | 485,000 |
Estimated Fair Value | ' |
Schedule of Available-for-sale Securities [Line Items] | ' |
Fair Value | 484,000 |
Amortized Cost Basis Rollforward | ' |
Face value of marketable securities acquired | 115,000 |
Discounts on purchase of marketable securities, net of acquisition costs | -1,000 |
Amortization on marketable securities | -1,000 |
Unrealized Gain (Loss) Rollforward | ' |
Increase in fair value of marketable securities | 2,000 |
Fair Value Rollforward | ' |
Marketable securities as of December 31, 2013 | 460,000 |
Face value of marketable securities acquired | 115,000 |
Discounts on purchase of marketable securities, net of acquisition costs | -1,000 |
Amortization on marketable securities | -1,000 |
Sales of securities | -91,000 |
Increase in fair value of marketable securities | 2,000 |
Marketable securities as of March 31, 2014 | 484,000 |
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] | ' |
Fair Value | 484,000 |
US Treasury Bonds | ' |
Schedule of Available-for-sale Securities [Line Items] | ' |
Amortized Cost Basis | 154,000 |
Unrealized Loss | 0 |
Fair Value | 154,000 |
Amortized Cost Basis Rollforward | ' |
Marketable securities as of March 31, 2014 | 154,000 |
Unrealized Gain (Loss) Rollforward | ' |
Marketable securities as of March 31, 2014 | 0 |
Fair Value Rollforward | ' |
Marketable securities as of March 31, 2014 | 154,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 99,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 99,000 |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] | ' |
Amortized Cost Basis | 154,000 |
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] | ' |
Fair Value | 154,000 |
US Treasury Bonds | Unrealized (loss) | ' |
Fair Value Rollforward | ' |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | -1,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | -1,000 |
US Agency Bonds | ' |
Schedule of Available-for-sale Securities [Line Items] | ' |
Amortized Cost Basis | 75,000 |
Unrealized Loss | -1,000 |
Fair Value | 74,000 |
Amortized Cost Basis Rollforward | ' |
Marketable securities as of March 31, 2014 | 75,000 |
Unrealized Gain (Loss) Rollforward | ' |
Marketable securities as of March 31, 2014 | -1,000 |
Fair Value Rollforward | ' |
Marketable securities as of March 31, 2014 | 74,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 69,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 69,000 |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] | ' |
Amortized Cost Basis | 75,000 |
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] | ' |
Fair Value | 74,000 |
US Agency Bonds | Unrealized (loss) | ' |
Fair Value Rollforward | ' |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | -1,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | -1,000 |
Corporate Bonds | ' |
Schedule of Available-for-sale Securities [Line Items] | ' |
Amortized Cost Basis | 256,000 |
Unrealized Loss | 0 |
Fair Value | 256,000 |
Amortized Cost Basis Rollforward | ' |
Marketable securities as of March 31, 2014 | 256,000 |
Unrealized Gain (Loss) Rollforward | ' |
Marketable securities as of March 31, 2014 | 0 |
Fair Value Rollforward | ' |
Marketable securities as of March 31, 2014 | 256,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 105,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 105,000 |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] | ' |
Amortized Cost Basis | 256,000 |
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] | ' |
Fair Value | 256,000 |
Corporate Bonds | Unrealized (loss) | ' |
Fair Value Rollforward | ' |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses | -1,000 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses | ($1,000) |