Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating activities:
Net loss	$ (5,650)	$ (9,499)
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation	52	64
Reduction in the carrying amount of right-of-use assets	268	242
Share-based compensation	565	846
Loss on disposal of property and equipment	0	4
Allowance for doubtful accounts	(34)	11
Changes in operating assets and liabilities:
Accounts receivable	87	86
Prepaid expenses and other current assets	179	123
Accounts payable	(165)	(24)
Accrued expenses and other current liabilities	(485)	598
Deferred revenue	0	(341)
Operating lease liability	(270)	(233)
Net cash used in operating activities	(5,453)	(8,123)
us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract
Purchase of property and equipment	(5)	(12)
Net cash used in investing activities	(5)	(12)
us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract
Proceeds from sales of common stock	10,513	3,042
Issuance costs of sale of common stock	(1,228)	(435)
Net cash provided by financing activities	9,285	2,607
Net change in cash and cash equivalents	3,827	(5,528)
Cash and cash equivalents at beginning of period	1,103	7,363
Cash and cash equivalents at end of period	4,930	1,835
us-gaap_SupplementalCashFlowElementsAbstract
Unpaid issuance costs of common stock	40	20
Issuance of restricted stock units in lieu of cash bonus obligations	$ 0	$ 564