Annual report pursuant to Section 13 and 15(d)

Restatement of Previously Issued Condensed Unaudited Financial Statements (Details 2)

Restatement of Previously Issued Condensed Unaudited Financial Statements (Details 2) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss		$ (4,005)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain on sale of assets	$ (1,732)	(1,732)	$ (1,755)
Depreciation and amortization		109	112	196
Stock-based milestone payment				50
Stock-based compensation		965	1,013	947
Other		(1)	(2)	2
Changes in operating assets and liabilities:
Receivables			(10)	76
Inventory				187
Prepaid expenses and other assets		122	177	164
Accounts payable		(374)	(476)	(751)
Deferred grant revenue		(184)	(184)	(99)
Other accrued liabilities		(152)	(423)	801
Net cash used in operating activities		(5,252)	(7,092)	(8,183)
Cash flows from investing activities:
Proceeds from sale of assets		228
Net cash provided by investing activities		228	732
Cash flows from financing activities:
Net proceeds from equity offering
Net proceeds from issuance of preferred stock		9,500	9,500
Proceeds from short-term loans		750	750
Net proceeds from the exercises of common stock warrants				4
Payments on short-term loans		(250)	(250)
Net cash provided by financing activities		10,000	10,000	4,984
Net increase (decrease) in cash, cash equivalents and restricted cash		4,976	3,640	(3,199)
Cash, cash equivalents and restricted cash at beginning of year		3,133	3,133	6,332
Cash, cash equivalents and restricted cash at end of year	8,109	8,109	6,773	3,133
Supplemental cash flow information:
Interest paid		4	21
Inventory transferred with sale of assets		106	106
Property and equipment, net, transferred with sale of assets		109	109
Notes receivable received in connection with sale of assets		1,500	1,000
Accounts payable related to sale of assets		17
Other accrued liabilities transferred with sale of assets		236	236
Cash and cash equivalents	8,096	8,096	6,760	2,937
Restricted cash	13	13	13	196
Cash, cash equivalents and restricted cash shown in the condensed statements of cash flows	8,109	8,109
Previously Reported [Member]
Cash flows from operating activities:
Net loss		(3,599)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain on sale of assets	(1,732)	(1,732)
Depreciation and amortization		109
Stock-based milestone payment
Stock-based compensation		965
Other		(1)
Changes in operating assets and liabilities:
Receivables
Inventory
Prepaid expenses and other assets		122
Accounts payable		(374)
Deferred grant revenue		(184)
Other accrued liabilities		(152)
Net cash used in operating activities		(4,846)
Cash flows from investing activities:
Proceeds from sale of assets		228
Net cash provided by investing activities		228
Cash flows from financing activities:
Net proceeds from equity offering
Net proceeds from issuance of preferred stock		9,094
Proceeds from short-term loans		750
Net proceeds from the exercises of common stock warrants
Payments on short-term loans		(250)
Net cash provided by financing activities		9,594
Net increase (decrease) in cash, cash equivalents and restricted cash		4,976
Cash, cash equivalents and restricted cash at beginning of year		3,133	3,133
Cash, cash equivalents and restricted cash at end of year	8,109	8,109		3,133
Supplemental cash flow information:
Interest paid		4
Inventory transferred with sale of assets		106
Property and equipment, net, transferred with sale of assets		109
Notes receivable received in connection with sale of assets		1,500
Accounts payable related to sale of assets		17
Other accrued liabilities transferred with sale of assets		236
Cash and cash equivalents	8,096	8,096
Restricted cash	13	13
Revision of Prior Period, Adjustment [Member]
Cash flows from operating activities:
Net loss		(406)
Adjustments to reconcile net loss to net cash used in operating activities:
Gain on sale of assets
Depreciation and amortization
Stock-based milestone payment
Stock-based compensation
Other
Changes in operating assets and liabilities:
Receivables
Inventory
Prepaid expenses and other assets
Accounts payable
Deferred grant revenue
Other accrued liabilities
Net cash used in operating activities		(406)
Cash flows from investing activities:
Proceeds from sale of assets
Net cash provided by investing activities
Cash flows from financing activities:
Net proceeds from equity offering
Net proceeds from issuance of preferred stock		406
Proceeds from short-term loans
Net proceeds from the exercises of common stock warrants
Payments on short-term loans
Net cash provided by financing activities		406
Net increase (decrease) in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash at beginning of year
Cash, cash equivalents and restricted cash at end of year
Supplemental cash flow information:
Interest paid
Inventory transferred with sale of assets
Property and equipment, net, transferred with sale of assets
Notes receivable received in connection with sale of assets
Accounts payable related to sale of assets
Other accrued liabilities transferred with sale of assets
Cash and cash equivalents
Restricted cash