Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Assets, Current [Abstract]
Cash	$ 5,331,770	$ 8,728,660
Accounts receivable	387,040	333,697
Inventories	568,215	494,374
Prepaid expense and other assets	597,724	521,700
Total current assets	6,884,749	10,078,431
Property and equipment, net	910,211	1,233,910
Intangibles, net	238,731	252,457
Lease right-of-use assets	2,432,339	2,728,355
Other long-term assets	121,096	124,096
Total assets	10,587,126	14,417,249
Current liabilities:
Accounts payable	1,563,023	1,342,027
Note payable	276,932	150,408
Accrued expenses and other liabilities	1,946,893	1,631,702
Derivative liability	8	1,376
Contract liabilities	269,943	308,091
Lease liability	561,712	517,427
Total current liabilities	4,618,511	3,951,031
Other long-term liabilities	13,661	5,459
Lease liability – net of current portion	1,860,983	2,188,979
Total liabilities	6,493,155	6,145,469
Stockholders’ equity:
Common stock, $.01 par value, 200,000,000 shares authorized, 4,062,853 shares outstanding as of March 31, 2024, and December 31, 2023	57,089	40,629
Additional paid-in capital	179,198,077	175,992,242
Accumulated deficit	(175,161,987)	(167,761,883)
Total stockholders’ equity	4,093,971	8,271,780
Total liabilities and stockholders’ equity	10,587,126	14,417,249
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 March 31, 2024, and December 31, 2023	$ 792	$ 792