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Supplemental disclosure of cash flow and non-cash investing and financing activities (Tables) | 9 Months Ended
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Sep. 30, 2016
Supplemental Cash Flow Elements [Abstract] |
Supplemental Disclosure of Cash Flow and Non-cash Investing and Financing Activities | Selected cash payments, receipts, and noncash activities are as follows (in thousands):
| Nine Months Ended September 30,
| 2016 |  | 2015
Cash paid for interest | $ | 118 |  |  | $ | 18 |
Income taxes paid | 637 |  |  | 1,506 |
Stock issuance of 441,009 shares in connection with acquisition | 3,346 |  |  | — |
Retirement of fixed assets | — |  |  | 319 |
Stock issuances of 43,344 and 16,493 shares in exchange for services performed, respectively | 346 |  |  | 164 |

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