Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 101,081	$ 127,540
Restricted cash	0	11,512
Short-term investments	57,487	19,443
Accounts receivable	300	26,750
Prepaid expenses and other current assets	3,520	3,245
Total current assets	162,388	188,490
Investments at fair value	208,796	0
Investment - equity method	2,284	0
Loan receivable and accrued interest	0	18,616
Investment warrants and shares	0	1,960
Patents, net	67,360	86,319
Other assets	382	618
Total assets	441,210	296,003
Current liabilities:
Accounts payable and accrued expenses	7,691	14,283
Royalties and contingent legal fees payable	19,824	13,908
Total current liabilities	27,515	28,191
Other liabilities	8,752	369
Total liabilities	36,267	28,560
Commitments and contingencies (Note 6)
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; 100,000,000 shares authorized; 50,604,782 and 50,476,042 shares issued and outstanding as of September 30, 2017 and December 31, 2016, respectively	51	50
Treasury stock, at cost, 1,729,408 shares as of September 30, 2017 and December 31, 2016	(34,640)	(34,640)
Additional paid-in capital	647,930	642,453
Accumulated comprehensive loss	(38)	(76)
Accumulated deficit	(209,815)	(342,198)
Total Acacia Research Corporation stockholders' equity	403,488	265,589
Noncontrolling interests in operating subsidiaries	1,455	1,854
Total stockholders' equity	404,943	267,443
Total liabilities and stockholders' equity	$ 441,210	$ 296,003