CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net loss	$ (21,663)	$ (50,041)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	213	1,094
Amortization of intangible assets	51	498
Amortization of right-of-use lease assets	871	947
Excess and obsolete inventory provisions	341	2,917
Impairment of long-lived assets	161	3,392
Provision for bad debt	(176)	571
Stock-based compensation	4,223	5,785
Amortization of debt issuance costs	1,717	456
Accretion of available for sale securities, net	(416)	(1,831)
Gain on sale of discontinued operations	(5,703)
Changes in operating assets and liabilities:
Accounts receivable	812	(373)
Inventory	(1,187)	1,156
Prepaid expenses and other assets	2,195	5,887
Accounts payable	(489)	(3,494)
Other accrued expenses and other liabilities	(2,146)	(2,996)
Deferred revenue	227	(19)
Accrued compensation	(749)	(506)
Net cash used in operating activities	(21,718)	(36,557)
Cash flows from investing activities:
Purchases of available-for-sale securities	(4,506)	(49,978)
Proceeds from maturities of available-for-sale securities	33,498	81,800
Purchases of property and equipment	(161)	(843)
Proceeds from sale of discontinued operations, net	14,208
Net cash provided by investing activities	43,039	30,979
Cash flows from financing activities:
Principal repayments on term loan	(22,200)
Tax paid on vested stock awards under employee stock plan	(3)	(92)
Issuance of stock under employee stock plans	(3)	117
Proceeds from exercise of pre-funded warrants		1
Principal repayments on finance lease	(28)	(23)
Net cash provided by (used in) financing activities	(22,234)	3
Net decrease in cash and cash equivalents	(913)	(5,575)
Cash and cash equivalents at beginning of period	14,009	17,665
Cash and cash equivalents at end of period	13,096	12,090
Cash paid for:
Interest	2,866	4,319
Supplemental schedule of non-cash investing and financing activities:
Operating lease right-of-use assets obtained in exchange for lease liabilities	$ 858	$ 1,792