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Revolving credit line (Tables) | 6 Months Ended
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Jun. 30, 2017
Debt Disclosure [Abstract] |
Schedule of Notes Payable | The following table summarizes our revolving credit line balances as of:
|  | June 30, 2017 |  | June 30, 2016
Revolving credit line - 4.75 percent at June 30, 2017 (prime plus 0.5 percent), due September 29, 2018 - current portion |  | $ | 2,500,000 |  |  | $ | — |
Revolving credit line - long-term portion |  | 2,500,000 |  |  | — |
Total |  | $ | 5,000,000 |  |  | $ | — |

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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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