Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 5,333,714	$ 7,991,172
Prepaid expenses, deposits and other current assets	1,050,008	923,059
Total current assets	6,383,722	8,914,231
Property and equipment, net	332,009	350,281
Intangible asset	8,639,000	8,639,000
Right of use asset	313,364
Other assets	319,724	298,480
Total assets	15,987,819	18,201,992
Current liabilities:
Accounts payable	480,016	198,818
Accrued expenses and other current liabilities	603,448	605,226
Current operating lease liability	110,001
Total current liabilities	1,193,465	804,044
Deferred income taxes	1,636,037	1,786,389
Noncurrent operating lease liability	203,363
Total liabilities	3,032,865	2,590,433
Commitments and Contingencies (Note 7)
Stockholders’ Equity:
Common stock, $0.001 par value: 1,000,000,000 shares authorized; 3,376,230 shares issued and outstanding at March 31, 2019 and December 31, 2018.	3,377	3,377
Additional paid-in capital	95,624,085	95,532,881
Accumulated deficit	(82,672,508)	(79,924,699)
Total stockholders' equity	12,954,954	15,611,559
Total liabilities and stockholders' equity	$ 15,987,819	$ 18,201,992