Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 63,220	$ 127,540
Restricted cash	0	11,512
Short-term investments	55,052	19,443
Accounts receivable	14,245	26,750
Prepaid expenses and other current assets	4,116	3,245
Total current assets	136,633	188,490
Investments at fair value	49,817	0
Investment - equity method	2,400	0
Loan receivable and accrued interest	0	18,616
Investment warrants and shares	0	1,960
Patents, net	75,233	86,319
Other assets	407	618
Total assets	264,490	296,003
Current liabilities:
Accounts payable and accrued expenses	9,239	14,283
Royalties and contingent legal fees payable	9,427	13,908
Total current liabilities	18,666	28,191
Other liabilities	577	369
Total liabilities	19,243	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; 50,597,449 and 50,476,042 shares issued and outstanding as of June 30, 2017 and December 31, 2016, respectively	51	50
Treasury stock, at cost, 1,729,408 shares as of June 30, 2017 and December 31, 2016	(34,640)	(34,640)
Additional paid-in capital	646,627	642,453
Accumulated comprehensive loss	(62)	(76)
Accumulated deficit	(368,280)	(342,198)
Total Acacia Research Corporation stockholders' equity	243,696	265,589
Noncontrolling interests in operating subsidiaries	1,551	1,854
Total stockholders' equity	245,247	267,443
Total liabilities and stockholders' equity	$ 264,490	$ 296,003