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Notes payable (Tables) | 12 Months Ended
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Dec. 31, 2013
Components of Notes Payable | The components of notes payable at December 31, 2013 and 2012 are as follows:
| 2013 |  |  | 2012 |
| (In thousands) |
Revolving credit agreement | $ | 500 |  |  | $ | 500 |
Capital lease obligation (Note 9) |  | — |  |  |  | 54 |
Total notes payable |  | 500 |  |  |  | 554 |
Less current portion of capital lease obligation |  | — |  |  |  | (54 | )
Non-current notes payable | $ | 500 |  |  | $ | 500 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration