Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 6,139,770	$ 7,991,172
Prepaid expenses, deposits and other current assets	578,613	923,059
Total current assets	6,718,383	8,914,231
Property and equipment, net	279,441	350,281
Intangible asset	8,639,000	8,639,000
Right of use asset	269,716
Other assets	290,674	298,480
Total assets	16,197,214	18,201,992
Current liabilities:
Accounts payable	502,473	198,818
Accrued expenses and other current liabilities	605,037	605,226
Current operating lease liability	110,969
Total current liabilities	1,218,479	804,044
Deferred income taxes	1,301,173	1,786,389
Noncurrent operating lease liability	158,747
Total liabilities	2,678,399	2,590,433
Commitments and Contingencies (Note 7)
Stockholders’ Equity:
Common stock, $0.001 par value: 1,000,000,000 shares authorized; 4,693,290 and 3,376,230 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	4,694	3,377
Additional paid-in capital	101,486,119	95,532,881
Accumulated deficit	(87,971,998)	(79,924,699)
Total stockholders' equity	13,518,815	15,611,559
Total liabilities and stockholders' equity	$ 16,197,214	$ 18,201,992