CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 82,134	$ 178,593
Marketable securities	89,033	32,965
Accounts and other receivables, net	22,594	18,354
Prepaid expenses and other current assets	8,851	4,217
Inventory	3,254	3,616
Total current assets	205,866	237,745
Property and equipment, net	1,111	476
Operating lease right-of-use assets	4,787	2,252
Intangible assets, net	21,519	22,749
Restricted cash	150	150
Total assets	233,433	263,372
Current liabilities:
Accounts payable	7,058	7,385
Accrued expenses	14,312	14,422
Deferred revenue	1,137	1,069
Short-term borrowings	10,475	0
Other current liabilities	408	782
Total current liabilities	33,390	23,658
Long-term debt	29,181	36,562
Deferred revenue - noncurrent	14,070	14,560
Operating lease liabilities - noncurrent	4,826	1,860
Other long-term liabilities	600	2,352
Total liabilities	82,067	78,992
Contingencies (Note 13)
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 June 30, 2022 and December 31, 2021; 34,052,616 and 33,905,826 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	34	34
Additional paid-in capital	760,209	752,602
Accumulated deficit	(609,479)	(569,097)
Accumulated other comprehensive income	602	841
Total stockholders' equity	151,366	184,380
Total liabilities and stockholders' equity	$ 233,433	$ 263,372