Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Cash and cash equivalents	$ 949,000	$ 1,103,000
Accounts receivable, net of allowance for doubtful accounts of $22 and $11 as of September 30, 2023 and December 31, 2022, respectively	58,000	63,000
Prepaid expenses and other current assets	252,000	295,000
Total current assets	1,259,000	1,461,000
Property and equipment, net	75,000	94,000
Operating lease right-of-use asset, net	1,174,000	1,261,000
Other assets	171,000	171,000
Total assets	2,679,000	2,987,000
Accounts payable	1,030,000	890,000
Accrued expenses and other current liabilities	2,696,000	2,385,000
Operating lease liability - current	345,000	333,000
Total current liabilities	4,071,000	3,608,000
Operating lease liability - noncurrent	883,000	982,000
Total liabilities	4,954,000	4,590,000
Commitments and Contingencies
Preferred stock, $0.001 par value, 25,000,000 shares authorized and no shares issued and outstanding as of March 31, 2024 and December 31, 2023	0	0
Common stock, $0.001 par value, 100,000,000 shares authorized, 26,836,389 and 23,666,534 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively	27,000	24,000
Additional paid-in capital	152,140,000	150,548,000
Accumulated deficit	(154,442,000)	(152,175,000)
Total stockholders’ equity (deficit)	(2,275,000)	(1,603,000)
Total liabilities and stockholders’ equity (deficit)	$ 2,679,000	$ 2,987,000