Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified
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Sep. 30, 2013
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Dec. 31, 2012
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Available-for-sale Securities |
$ 96
|
$ 92
|
Carrying (Reported) Amount, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
49,627
|
|
Marketable Securities, Fair Value Disclosure |
2,288
|
|
Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
49,627
|
|
Marketable Securities, Fair Value Disclosure |
2,288
|
|
Fair Value, Inputs, Level 1 [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
49,627
|
|
Marketable Securities, Fair Value Disclosure |
2,288
|
|
Money Market Funds [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
48
|
|
Money Market Funds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
48
|
|
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
48
|
|
Mutual Funds [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
48
|
|
Mutual Funds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
48
|
|
Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
48
|
|
US Treasury Securities [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
1,370
|
|
US Treasury Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
1,370
|
|
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
1,370
|
|
US Government Agencies Securities [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
822
|
|
US Government Agencies Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
822
|
|
US Government Agencies Securities [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Marketable Securities, Fair Value Disclosure |
822
|
|
Cash [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
12,303
|
|
Cash [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
12,303
|
|
Cash [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
12,303
|
|
Money Market Funds [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
37,324
|
|
Money Market Funds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
37,324
|
|
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
|
|
|
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
|
|
Cash and Cash Equivalents, Fair Value Disclosure |
$ 37,324
|
|