Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 256,323	$ 302,605
Restricted cash	171	144
Accounts receivable, net of allowance for credit losses of $1,381 and $1,298	23,087	19,420
Inventories	12,903	13,040
Prepaids and other current assets	12,960	14,864
Total current assets	305,444	350,073
Property and equipment, net	27,340	27,577
Intangible assets, net	31,081	25,254
Goodwill	6,160	6,160
Equity securities, including securities measured at fair value of $32,328 and $41,046	137,421	155,873
Operating lease right-of-use assets	2,762	3,468
Other long-term assets, net	12,584	12,951
Property and equipment, net held for sale	54,466	54,462
Total assets	577,258	635,818
Current liabilities:
Accounts payable	116,265	106,070
Accrued liabilities	72,528	73,682
Unearned revenue	54,675	49,597
Operating lease liabilities, current	2,407	2,814
Current debt, net held for sale	0	232
Total current liabilities	245,875	232,395
Operating lease liabilities, non-current	582	940
Other long-term liabilities	8,847	9,107
Long-term debt, net held for sale	34,207	34,244
Total liabilities	289,511	276,686
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $0.0001 par value, authorized shares - 5,000, issued and outstanding - none	0	0
Common stock, $0.0001 par value, authorized shares - 100,000	5	5
Additional paid-in capital	1,013,360	1,007,649
Accumulated deficit	(555,599)	(481,671)
Accumulated other comprehensive loss	(502)	(506)
Treasury stock at cost - 6,477 and 6,356	(169,517)	(166,345)
Total stockholders' equity	287,747	359,132
Total liabilities and stockholders' equity	$ 577,258	$ 635,818