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Prepaid Expenses and Other Current Assets | 9 Months Ended | 12 Months Ended
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Sep. 30, 2016 | Dec. 31, 2015
Text Block [Abstract] |  |
Prepaid Expenses and Other Current Assets | 5. Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets comprised of the following:
|  | September 30, 2016 |  |  | December 31, 2015 |
Prepaid insurance |  | $ | 30 |  |  | $ | 100 |
Prepaid expenses |  |  | 189 |  |  |  | 533 |
Prepaid income taxes |  |  | — |  |  |  | 888 |
Other receivables |  |  | 46 |  |  |  | 3 |
IPO costs |  |  | 1,018 |  |  |  | — |
Total prepaid expenses and other current assets |  | $ | 1,283 |  |  | $ | 1,524 |
| 4. Prepaid Expenses and Other Current Assets As of December 31, 2015 and 2014, prepaid expenses and other current assets were comprised of the following:
|  | 2015 |  |  | 2014 |
Prepaid insurance |  | $ | 100 |  |  | $ | 585 |
Prepaid expenses |  |  | 533 |  |  |  | 514 |
Prepaid income taxes |  |  | 888 |  |  |  | 2,393 |
Other receivables |  |  | 3 |  |  |  | 264 |
Other current assets |  |  | — |  |  |  | 167 |
Prepaid expenses and other current assets |  | $ | 1,524 |  |  | $ | 3,923 |

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