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Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] Common Class A [Member] | Common Stock [Member] Common Class B [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Parent [Member] | Noncontrolling Interest [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2015 | 3,191 | 612 |  |  |  |  |
Balance at Dec. 31, 2015 | $ 32 | $ 6 | $ 58,924 | $ (20,181) | $ 38,781 | $ 2,975 | $ 41,756
Stock options - compensation costs |  |  | 29 |  | 29 |  | 29
Net loss |  |  |  | (69) | (69) | (340) | (409)
Balance (in shares) at Dec. 31, 2016 | 3,191 | 612 |  |  |  |  |
Balance at Dec. 31, 2016 | $ 32 | $ 6 | 58,953 | (20,250) | 38,741 | 2,635 | 41,376
Stock options - compensation costs |  |  | 12 |  | 12 |  | 12
Net loss |  |  |  | (307) | (307) | (509) | (816)
Balance (in shares) at Dec. 31, 2017 | 3,191 | 612 |  |  |  |  |
Balance at Dec. 31, 2017 | $ 32 | $ 6 | $ 58,965 | $ (20,557) | $ 38,446 | $ 2,126 | $ 40,572

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