Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (4,269)	$ (5,374)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	29	26
Amortization of operating lease right-of-use assets	201	191
Loss on sale of fixed assets	83
Share-based compensation expense	100	73
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(481)	(438)
Accounts payable	(278)	519
Operating lease liability	(194)	(177)
Accrued expenses and other liabilities	(846)	(741)
Net cash used in operating activities	(5,655)	(5,921)
Cash flows from investing activities:
Purchases of property and equipment	(28)	(82)
Proceeds from the sale of property and equipment	52
Net cash used in investing activities	24	(82)
(Decrease) Increase in cash and cash equivalents and restricted cash	(5,631)	(6,003)
Cash, cash equivalents and restricted cash at beginning of period	16,501	19,181
Cash, cash equivalents and restricted cash at end of period	10,870	$ 13,178
Supplemental disclosure of cash flow information and non-cash investing and financing activities:
Assets classified as assets held for sale	$ 53