Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 145,329	$ 135,223
Restricted cash	11,523	10,725
Accounts receivable	25,175	33,500
Deferred income taxes	210	210
Prepaid expenses and other current assets	4,352	4,219
Total current assets	186,589	183,877
Property and equipment, net	231	272
Patents, net	151,882	162,642
Other assets	1,111	1,110
Total assets	339,813	347,901
Current liabilities:
Accounts payable and accrued expenses	14,580	17,347
Accrued patent investment costs	0	1,000
Royalties and contingent legal fees payable	18,618	14,878
Total current liabilities	33,198	33,225
Deferred income taxes	210	210
Other liabilities	345	311
Total liabilities	$ 33,753	$ 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; 50,458,905 and 50,651,239 shares issued and outstanding as of March 31, 2016 and December 31, 2015, respectively	50	51
Treasury stock, at cost, 1,729,408 shares as of March 31, 2016 and December 31, 2015	(34,640)	(34,640)
Additional paid-in capital	634,882	633,146
Accumulated comprehensive loss	(148)	(215)
Accumulated deficit	(298,096)	(288,131)
Total Acacia Research Corporation stockholders' equity	302,048	310,211
Noncontrolling interests in operating subsidiaries	4,012	3,944
Total stockholders' equity	306,060	314,155
Total liabilities and stockholders' equity	$ 339,813	$ 347,901