| Accrued Expenses |
Accrued Expenses Accrued expenses are comprised of the following: | | | | | | | | | | | | December 31, 2016 | | December 31, 2015 | Accrued compensation | | $ | 1,058,671 |
| | $ | 2,236,494 |
| Accrued consulting and professional fees | | 1,270,568 |
| | 1,561,425 |
| Accrued marketing and promotion | | 10,307 |
| | 69,258 |
| Other accrued expenses | | 259,567 |
| | 588,746 |
| Accrued income taxes | | 129,784 |
| | 106,270 |
| Accrued other taxes | | 699,872 |
| | 1,247,596 |
| Accrued hardware purchases | | — |
| | 67,280 |
| Accrued restructuring costs | | 846,337 |
| | 717,640 |
| Accrued Series A redeemable convertible preferred stock dividends | | 195,904 |
| | 188,805 |
| | | $ | 4,471,010 |
| | $ | 6,783,514 |
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