CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (14,127)	$ (33,061)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	137	710
Amortization intangible assets	51	331
Amortization of right-of-use lease assets	602	628
Excess and obsolete inventory provisions	241	2,917
Impairment of long-lived assets	161
Stock-based compensation	3,593	4,001
Amortization of debt issuance costs	1,444	297
Accretion of available for sale securities, net	(353)	(1,272)
Gain on sale of discontinued operations	(5,703)
Changes in operating assets and liabilities:
Accounts receivable, net	554	(510)
Inventory	(1,398)	(616)
Prepaid expenses and other assets	1,716	6,543
Accounts payable	(245)	(3,346)
Other accrued expenses and other liabilities	(3,041)	(2,056)
Deferred revenue	169	19
Accrued compensation	(1,208)	(926)
Net cash used in operating activities	(17,407)	(26,341)
Cash flows from investing activities:
Purchases of available-for-sale securities	(2,118)	(30,733)
Proceeds from maturities of available-for-sale securities	26,698	52,500
Purchases of property and equipment	(161)	(627)
Proceeds from sale of discontinued operations, net	14,204
Net cash provided by investing activities	38,623	21,140
Financing activities:
Principal repayments on term loan	(19,500)
Tax paid on vested stock awards under employee stock plan	(4)
Issuance of stock under employee stock plans		117
Proceeds from exercise of pre-funded warrants		1
Principal repayments on finance lease	(18)	(15)
Net cash provided by (used in) financing activities	(19,522)	103
Net decrease in cash and cash equivalents	1,694	(5,098)
Cash and cash equivalents at beginning of period	14,009	17,665
Cash and cash equivalents at end of period	15,703	12,567
Cash paid for:
Interest	2,129	2,828
Supplemental schedule of non-cash investing and financing activities:
Operating lease right-of-use assets obtained in exchange for lease liabilities	$ 858	$ 1,792