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Note 7 - Accrued Expenses and Other Current Liabilities | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] | 7. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consist of the following:
|  | December 31, |
|  | 2017 |  |  | 2016 |
Accrued interest payable |  | $ | 37,415 |  |  | $ | 29,359 |
Accrued Series A dividends |  |  | 1,062,314 |  |  |  | — |
Accrued payroll and payroll related expenses |  |  | 312,221 |  |  |  | 399,740 |
Accrued professional fees |  |  | 122,711 |  |  |  | 72,855 |
Accrued clinical studies expenses |  |  | 63,350 |  |  |  | 220,978 |
Other |  |  | 30,840 |  |  |  | 151,332 |
Total |  | $ | 1,628,851 |  |  | $ | 874,264 |

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- Definition The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as current at the end of the reporting period. + References No definition available. + Details
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- References No definition available. + Details
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