CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 15,703	$ 14,009
Short-term investments	8,533	32,773
Accounts receivable, net	4,528	4,790
Inventory	11,798	11,074
Prepaid expenses and other current assets	1,025	1,969
Current assets of discontinued operations	927	656
Total current assets	42,514	65,271
Property and equipment, net	766	461
Operating lease right-of-use assets	2,899	2,703
Other assets	124	128
Non-current assets of discontinued operations		9,597
Total assets	46,303	78,160
Current liabilities:
Accounts payable	931	1,142
Accrued compensation	1,550	2,413
Other accrued expenses	1,874	3,072
Operating lease liabilities	983	1,250
Current portion of term loan	10,800	24,900
Other current liabilities	1,592	1,844
Current liabilities of discontinued operations		700
Total current liabilities	17,730	35,321
Operating lease liabilities, net of current	1,765	1,423
Term loan, net of current	8,511	12,467
Other liabilities	428	530
Total liabilities	28,434	49,741
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.001 par value; authorized -10,000,000 shares; issued and outstanding - none
Common stock, $0.001 par value; authorized - 500,000,000 shares; issued and outstanding- 72,834,586 shares as of June 30, 2024 and 63,547,467 shares as of December 31, 2023	73	64
Additional paid-in-capital	461,938	458,357
Accumulated other comprehensive (loss) gain	(2)	11
Accumulated deficit	(444,140)	(430,013)
Total stockholders' equity	17,869	28,419
Total liabilities and stockholders' equity	$ 46,303	$ 78,160