CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 95,633	$ 178,593
Marketable securities	48,928	32,965
Accounts and other receivables, net	15,503	18,354
Prepaid expenses and other current assets	9,858	4,217
Inventory	2,886	3,616
Total current assets	172,808	237,745
Property and equipment, net	1,360	476
Operating lease right-of-use assets	6,038	2,252
Intangible assets, net	0	22,749
Restricted cash	150	150
Total assets	180,356	263,372
Current liabilities:
Accounts payable	5,919	7,385
Accrued expenses	16,359	14,422
Deferred revenue	1,205	1,069
Short-term borrowings	10,475	0
Other current liabilities	579	782
Total current liabilities	34,537	23,658
Long-term debt	29,310	36,562
Deferred revenue - noncurrent	13,557	14,560
Operating lease liabilities - noncurrent	5,984	1,860
Other long-term liabilities	600	2,352
Total liabilities	83,988	78,992
Contingencies (Note 17)
Stockholders’ equity:
Preferred stock, $.001 par value, 5,000,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $.001 par value, 300,000,000 shares authorized at December 31, 2022 and 2021, respectively; 34,082,934 and 33,905,826 shares issued and outstanding at December 31, 2022 and 2021, respectively	34	34
Additional paid-in capital	766,899	752,602
Accumulated deficit	(671,351)	(569,097)
Accumulated other comprehensive income	786	841
Total stockholders’ equity	96,368	184,380
Total liabilities and stockholders’ equity	$ 180,356	$ 263,372