Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net Loss	$ (11,149)	$ (12,254)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock based compensation	1,274	1,481
Depreciation and amortization	40	17
Impairment loss on operating lease	0	66
Loss on disposal of fixed assets	0	73
Equity investment in Lighthouse, Inc.	0	(70)
Change in the fair value of contingent consideration liabilities	2,545	0
Change in fair value of long-term debt	388	0
Non-cash intangible impairment charge	0	5,900
Amortization of discount on available-for-sale investments	(646)	(139)
Change in deferred tax liabilities due to acquisition of Novosteo, Inc.	0	(248)
Changes in operating assets and liabilities, net of acquisitions:
Prepaid expenses and other current assets	(440)	1,413
Right of use assets, operating leases and operating lease liabilities	(35)	(45)
Other assets	(8)	0
Accounts payable	59	1,081
Accrued expenses and other current liabilities	(381)	(844)
Net cash used in operating activities	(8,353)	(3,569)
Cash flow from investing activities:
Purchase of investments	(39,292)	(7,691)
Proceeds from maturities of investments	48,245	13,277
Proceeds from disposal of assets	0	90
Purchase of property and equipment	(39)	(136)
Net cash provided by investing activities	8,914	5,540
Cash flows from financing activities:
Payments of finance leases	0	(6)
Proceeds from issuance of common stock on exercise of stock options	190	56
Net cash provided by financing activities	190	50
Effect of exchange rate changes on cash	310	114
Net increase in cash and cash equivalents	1,061	2,135
Cash and cash equivalents at beginning of period	20,752	44,579
Cash and cash equivalents at end of period	21,813	46,714
Supplemental disclosures of non-cash information:
Right-of-use assets obtained in exchange for new operating lease liabilities	227	0
Right-of-use asset and financing lease liability reduction as a result of lease modification	$ 0	$ (70)