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Summary of Unaudited Quarterly Financial Information (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 14,737 | $ 13,005 | $ 9,580 | $ 11,651 | $ 13,635 | $ 6,375 | $ 5,742 | $ 5,636 | $ 48,973 | $ 31,388 | $ 30,037
Total operating costs and expenses | 8,310 | 9,935 | 8,066 | 7,719 | 9,363 | 7,800 | 7,557 | 6,475 | 34,030 | 31,195 | 32,617
Income tax expense | (138) | (60) | (110) | (66) | 1,636 | (142) | (338) | 35 | (374) | 1,191 | 13,270
Income from continuing operations | 1,869 | 1,965 | 3,694 | 1,304 | 2,586 | (194) | (4,328) | (738) | 8,832 | (2,674) | 9,712
Discontinued operations | 0 | 0 | 2,397 | 191 | (1,523) | 0 | 1,799 | 1,871 | 2,588 | 2,147 | 3
Net income (loss) | $ 1,869 | $ 1,965 | $ 6,091 | $ 1,495 | $ 1,063 | $ (194) | $ (2,529) | $ 1,133 | $ 11,420 | $ (527) | $ 9,715
Basic per share amounts: |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations (in usd per share) | $ 0.09 | $ 0.10 | $ 0.18 | $ 0.06 |  |  |  |  | $ 0.43 | $ (0.14) | $ 0.49
Discontinued operations (in usd per share) | $ 0.00 | $ 0.00 | $ 0.12 | $ 0.01 |  |  |  |  | $ 0.13 | $ 0.11 | $ 0.00
Net income (loss) (in usd per share) | $ 0.09 | $ 0.10 | $ 0.30 | $ 0.07 |  |  |  |  | $ 0.56 | $ (0.03) | $ 0.49
Weighted average number of common shares-basic (in shares) | 20,442,603,000 | 20,357,558,000 | 20,258,618,000 | 20,189,378,000 | 20,034,558,000 | 19,917,676,000 | 19,749,266,000 | 19,709,078,000 | 20,312,395 | 19,853,095 | 19,655,632
Diluted per share amounts: |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations (in usd per share) | $ 0.09 | $ 0.09 | $ 0.18 | $ 0.06 |  |  |  |  | $ 0.43 | $ (0.14) | $ 0.49
Discontinued operations (in usd per share) | $ 0.00 | $ 0.00 | $ 0.12 | $ 0.01 |  |  |  |  | $ 0.12 | $ 0.11 | $ 0.00
Net income (loss) income (in usd per share) | $ 0.09 | $ 0.09 | $ 0.30 | $ 0.07 |  |  |  |  | $ 0.55 | $ (0.03) | $ 0.49
Weighted average number of common shares-diluted (in shares) | 21,056,156,000 | 20,843,742,000 | 20,427,360,000 | 20,280,030,000 | 20,124,331,000 | 19,917,676,000 | 19,749,266,000 | 19,738,801,000 | 20,745,454 | 19,853,095 | 19,713,320
Basic and diluted per share amounts: |  |  |  |  |  |  |  |  |  |  |
(Loss) income from continuing operations (in usd per share) |  |  |  |  | $ 0.13 | $ (0.01) | $ (0.22) | $ (0.04) |  |  |
Discontinued operations (in usd per share) |  |  |  |  | $ (0.08) | $ 0.00 | $ 0.09 | $ 0.10 |  |  |
Net (loss) income (in usd per share) |  |  |  |  | $ 0.05 | $ (0.01) | $ (0.13) | $ 0.06 |  |  |

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