Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 25,561,599	$ 14,177,349
Prepaid expenses, deposits and other current assets	1,147,174	472,464
Total current assets	26,708,773	14,649,813
Property and equipment, net	198,325	252,366
Intangible asset	8,639,000	8,639,000
Right of use asset	194,879	247,043
Other assets	252,149	322,301
Total assets	35,993,126	24,110,523
Current liabilities:
Accounts payable	1,354,948	1,251,412
Accrued expenses and other current liabilities	317,075	358,532
Current operating lease liability	109,808	111,477
Total current liabilities	1,781,831	1,721,421
Deferred income taxes	1,249,569	2,119,274
Noncurrent operating lease liability	85,071	135,566
Total liabilities	3,116,471	3,976,261
Commitments and Contingencies (Note 7)
Stockholders’ Equity:
Common stock, $0.001 par value: 1,000,000,000 shares authorized; 63,998,298 and 33,480,365 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	63,999	33,481
Additional paid-in capital	130,220,772	111,824,859
Accumulated deficit	(97,408,116)	(91,724,078)
Total stockholders' equity	32,876,655	20,134,262
Total liabilities and stockholders' equity	$ 35,993,126	$ 24,110,523