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Notes payable (Tables) | 12 Months Ended
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Dec. 31, 2016
Debt Disclosure [Abstract] |
Components of Notes Payable | The components of notes payable at December 31, 2016 and 2015 are as follows:
| 2016 |  |  | 2015 |
| (In thousands) |
Revolving credit agreement | $ | 1,500 |  |  | $ | 1,043 |
Current portion of long-term notes payable...................................... |  | 300 |  |  |  | 300 |
Long-term notes payable |  | 3,900 |  |  |  | 4,200 |
Total revolving credit agreement | $ | 5,700 |  |  | $ | 5,543 |
Schedule of Principal Payments of Debt | Principal payments of debt for years subsequent to 2017 are as follows (in thousands):
| Amount |
| (In thousands) |
2017 | $ | 1,800 |
2018 |  | 300 |
2019 |  | 300 |
2020 |  | 3,300 |
2021 |  | - |
| $ | 5,700 |

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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
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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