Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 15,289,543	$ 10,380,493
Restricted cash	110,000	110,000
Prepaid expenses	430,042	509,833
Research and development tax rebate receivable	568,980	518,098
Other current assets	2,064	30,942
Total current assets	16,400,629	11,549,366
Furniture and equipment, net	39,142	54,487
Intangible assets, net	76,250	99,375
Right-of-use asset	63,284
Other assets	17,218	17,218
Total Assets	16,596,523	11,720,446
Current liabilities
Accounts payable	501,430	353,328
Accrued expenses	225,472	177,074
Payroll liabilities	769,727	935,070
Stock-based compensation liability		1,410,025
Lease liability	49,266
Other current liabilities	18,415	39,939
Total current liabilities	1,564,310	2,915,436
Long term liabilities
Lease liability long term	14,018
Total Liabilities	1,578,328	2,915,436
Commitments and contingencies (note 11)
Stockholders' equity
Preferred stock - $0.001 par value; 10,000,000 shares authorized; 671 and 2,379 shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively	1	2
Additional paid-in capital- Series B convertible preferred stock	670,999	2,378,997
Common stock - $0.18 par value; 175,000,000 shares authorized, and 9,130,984 and 5,846,552 shares issued and outstanding, as of September 30, 2019 and December 31, 2018, respectively	1,643,565	1,052,372
Additional paid-in capital	104,156,643	82,204,902
Accumulated deficit	(91,453,013)	(76,831,263)
Total Stockholders' Equity	15,018,195	8,805,010
Total Liabilities and Stockholders' Equity	$ 16,596,523	$ 11,720,446