Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Assets, Current [Abstract]
Cash and cash equivalents	$ 11,915,048	$ 22,071,523
Accounts receivable	544,756	331,196
Inventories	439,989	430,493
Prepaid expense and other assets	620,692	526,801
Total current assets	13,520,485	23,360,013
Property and equipment, net	1,392,681	1,833,255
Intangibles, net	259,320	253,865
Lease right-of-use assets	2,870,286	211,893
Other long-term assets	124,096	75,618
Total assets	18,166,868	25,734,644
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	1,168,226	943,452
Note payable	260,220	0
Accrued expenses and other liabilities	1,810,838	2,229,075
Derivative liability	2,109	13,833
Contract liabilities	374,957	602,073
Lease liability	555,541	94,237
Total current liabilities	4,171,891	3,882,670
Lease liability – net of current portion	2,343,622	86,082
Total liabilities	6,515,513	3,968,752
Commitments and Contingencies
Stockholders’ equity:
Common stock, $.01 par value, 200,000,000 shares authorized, 4,033,293 and 3,938,160 shares outstanding as of September 30, 2023 and December 31, 2022, respectively	40,333	39,382
Additional paid-in capital	175,896,766	175,503,634
Accumulated deficit	(164,286,536)	(153,777,916)
Total stockholders’ equity	11,651,355	21,765,892
Total liabilities and stockholders’ equity	18,166,868	25,734,644
Series B Convertible Preferred Stock [Member]
Stockholders’ equity:
Series B Convertible Preferred Stock, $.01 par value, 2,300,000 shares authorized, 79,246 shares outstanding as of September 30, 2023 and December 31, 2022	$ 792	$ 792