Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 139,772	$ 135,223
Restricted cash	14,036	10,725
Short-term investments	32,243	0
Accounts receivable	4,325	33,500
Deferred income taxes	210	210
Prepaid expenses and other current assets	4,310	4,219
Total current assets	194,896	183,877
Property and equipment, net	189	272
Patents, net	100,958	162,642
Other assets	365	1,110
Total assets	296,408	347,901
Current liabilities:
Accounts payable and accrued expenses	11,424	17,347
Accrued patent investment costs	0	1,000
Royalties and contingent legal fees payable	17,854	14,878
Total current liabilities	29,278	33,225
Deferred income taxes	210	210
Other liabilities	354	311
Total liabilities	29,842	33,746
Commitments and contingencies (Note 5)
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; 50,392,241 and 50,651,239 shares issued and outstanding as of June 30, 2016 and December 31, 2015, respectively	50	51
Treasury stock, at cost, 1,729,408 shares as of June 30, 2016 and December 31, 2015	(34,640)	(34,640)
Additional paid-in capital	636,332	633,146
Accumulated comprehensive loss	(171)	(215)
Accumulated deficit	(338,669)	(288,131)
Total Acacia Research Corporation stockholders' equity	262,902	310,211
Noncontrolling interests in operating subsidiaries	3,664	3,944
Total stockholders' equity	266,566	314,155
Total liabilities and stockholders' equity	$ 296,408	$ 347,901