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v3.19.1

Condensed Consolidated Statement of Stockholders' Equity Statement - USD ($) $ in Thousands | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Comprehensive Income (Loss) [Member] | Accumulated Deficit [Member] | Noncontrolling Interests in Operating Subsidiaries [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Common Shares, outstanding at period start (in shares) at Dec. 31, 2017 |  | 50,639,926 |  |  |  |  |
Balance at period start at Dec. 31, 2017 | $ 295,659 | $ 51 | $ (34,640) | $ 648,996 | $ (88) | $ (320,018) | $ 1,358
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net loss attributable to Acacia Research Corporation | (32,038) |  |  |  |  | (32,038) |
Stock options exercised (in shares) |  | 10,000 |  |  |  |  |
Stock options exercised | $ 31 |  |  | $ 31 |  |  |
Compensation expense for share-based awards, net of forfeitures | 704,000 |  |  | 704,000 |  |  |
Repurchase of restricted common stock (in shares) |  | (2,044) |  |  |  |  |
Repurchase of restricted common stock | $ (7) |  |  | $ (7) |  |  |
Net income attributable to noncontrolling interests in subsidiaries | (73) |  |  |  |  |  | (73)
Unrealized gain on foreign currency translation | (17) |  |  |  | (17) |  |
Unrealized loss on short-term investments | (20) |  |  |  | (20) |  |
Common shares, outstanding at period end (in shares) at Mar. 31, 2018 |  | 50,647,882 |  |  |  |  |
Balance at period end at Mar. 31, 2018 | $ 267,053 | $ 51 | (34,640) | 649,724 | (125) | (349,550) | 1,593
Common Shares, outstanding at period start (in shares) at Dec. 31, 2018 | 49,639,319 | 49,639,319 |  |  |  |  |
Balance at period start at Dec. 31, 2018 | $ 191,240 | $ 50 | (39,272) | 651,156 | 0 | (422,541) | 1,847
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net loss attributable to Acacia Research Corporation | (4,384) |  |  |  |  | (4,384) |
Stock options exercised (in shares) |  | 16,748 |  |  |  |  |
Stock options exercised | (8) |  |  | (8) |  |  |
Net income attributable to noncontrolling interests in subsidiaries | $ (14) |  |  |  |  |  | (14)
Common shares, outstanding at period end (in shares) at Mar. 31, 2019 | 49,656,067 | 49,656,067 |  |  |  |  |
Balance at period end at Mar. 31, 2019 | $ 186,834 | $ 50 | $ (39,272) | $ 651,148 | $ 0 | $ (426,925) | $ 1,833

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