Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 135,223	$ 134,466
Restricted cash	10,725	0
Short-term investments	0	58,558
Accounts receivable	33,500	20,168
Deferred income tax	210	1,161
Prepaid expenses and other current assets	4,219	4,355
Total current assets	183,877	218,708
Furniture and equipment, net of accumulated depreciation and amortization	272	500
Patents, net of accumulated amortization	162,642	286,636
Goodwill	0	30,149
Other assets	1,110	355
Total assets	347,901	536,348
Current liabilities:
Accounts payable and accrued expenses	17,347	14,860
Accrued patent investment costs	1,000	16,700
Royalties and contingent legal fees payable	14,878	14,351
Total current liabilities	33,225	45,911
Deferred income taxes	210	1,161
Other liabilities	311	228
Total liabilities	$ 33,746	$ 47,300
Commitments and contingencies (Note 11)
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; 50,651,239 shares issued and outstanding as of December 31, 2015 and 50,065,382 shares issued and outstanding as of December 31, 2014	51	50
Treasury stock, at cost, 1,729,408 shares as of December 31, 2015 and December 31, 2014	(34,640)	(34,640)
Additional paid-in capital	633,146	646,595
Accumulated comprehensive loss	(215)	(353)
Accumulated deficit	(288,131)	(128,095)
Total Acacia Research Corporation stockholders’ equity	310,211	483,557
Noncontrolling interests in operating subsidiaries	3,944	5,491
Total stockholders’ equity	314,155	489,048
Total liabilities and stockholders' equity	$ 347,901	$ 536,348