CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 241,874	$ 308,943
Equity securities at fair value	81,384	361,778
Equity securities without readily determinable fair value	5,816	5,816
Investment securities - equity method investments	72,106	30,934
Accounts receivable, net	7,040	9,517
Inventories, net	13,802	8,930
Prepaid expenses and other current assets	5,173	4,764
Total current assets	427,195	730,682
Long-term restricted cash	0	418
Property, plant and equipment, net	3,700	4,183
Goodwill	7,470	7,470
Other intangible assets, net	39,692	48,793
Leased right-of-use assets	2,393	2,027
Other non-current assets	4,819	5,283
Total assets	485,269	798,856
Current liabilities:
Accounts payable	5,097	5,440
Accrued expenses and other current liabilities	9,258	6,227
Accrued compensation	5,070	3,698
Royalties and contingent legal fees payable	3,259	2,463
Deferred revenue	1,403	1,114
Senior secured notes payable	61,350	181,248
Total current liabilities	85,437	200,190
Deferred revenue, net of current portion	665	581
Series A warrant liabilities	9,396	11,291
Series A embedded derivative liabilities	22,389	18,448
Series B warrant liabilities	59,742	96,378
Long-term lease liabilities	2,186	2,027
Deferred income tax liabilities, net	2,710	18,552
Other long-term liabilities	1,781	6,161
Total liabilities	184,306	353,628
Commitments and contingencies
Series A redeemable convertible preferred stock, par value $0.001 per share; stated value $100 per share; 350,000 shares authorized, issued and outstanding as of September 30, 2022 and December 31, 2021; aggregate liquidation preference of $35,000 as of September 30, 2022 and December 31, 2021	18,482	14,753
Stockholders' equity:
Preferred stock, par value $0.001 per share; 10,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, par value $0.001 per share; 300,000,000 shares authorized; 38,540,276 and 48,807,748 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively	38	49
Treasury stock, at cost, 16,183,703 and 5,388,469 shares as of September 30, 2022 and December 31, 2021, respectively	(98,258)	(47,281)
Additional paid-in capital	644,329	648,389
Accumulated deficit	(288,403)	(181,724)
Total Acacia Research Corporation stockholders' equity	257,706	419,433
Noncontrolling interests	24,775	11,042
Total stockholders' equity	282,481	430,475
Total liabilities, redeemable convertible preferred stock, and stockholders' equity	$ 485,269	$ 798,856