Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 11,463,098	$ 12,846,113
Accounts receivable	182,431	71,017
Inventory, net	268,930	237,909
Current portion of mortgage note receivable	42,053	40,772
Prepaid insurance and services	172,191	126,474
Prepaid clinical expenses	1,991,866	727,952
Total current assets	14,120,569	14,050,237
FURNITURE AND EQUIPMENT, NET	67,997	53,910
RIGHT-TO-USE LEASE ASSET, NET	26,453	34,011
MORTGAGE NOTE RECEIVABLE, LESS CURRENT PORTION	28,356	49,806
TOTAL ASSETS	14,243,375	14,187,964
CURRENT LIABILITIES
Current portion of lease liability	18,014	17,483
Current portion of note payable	86,884	114,029
Accounts payable and accrued expenses	2,930,267	3,541,041
Total current liabilities	3,035,165	3,672,553
LONG-TERM LEASE LIABILITY
Long-term lease liability, less current portion	10,392	18,434
Long-term note payable, less current portion	71,640	44,495
Total long-term liabilities	82,032	62,929
STOCKHOLDERS' EQUITY
Common stock, par value $.0001 per share, 20,000,000 shares authorized, 6,435,816 and 4,770,761 shares issued and outstanding, at June 30, 2021 and December 31, 2020, respectively	644	477
Preferred stock, par value $.0001 per share, 5,000,000 shares authorized	0	0
Additional paid-in capital	52,821,383	44,513,841
Accumulated deficit	(41,695,849)	(34,061,836)
Total stockholders' equity	11,126,178	10,452,482
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 14,243,375	$ 14,187,964