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Summary of Significant Accounting Policies (Details) - USD ($) shares in Thousands |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 01, 2019 | Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2019 | Dec. 31, 2018
Equity Method Investment |  |  |  |  |  |  |  |
Loss on equity method investment |  |  |  |  | $ (359,000) | $ 0 |  |
Equity method investment |  | $ 8,641,000 |  |  | 8,641,000 |  |  | $ 0
Health Insurance |  |  |  |  |  |  |  |
Risk of loss for each health insurance plan participant |  |  |  |  | $ 500,000 |  |  |
Earnings per Share |  |  |  |  |  |  |  |
Common stock equivalents (in shares) |  | 572 |  | 635 | 555 | 505 |  |
Anti-dilutive common stock equivalents (in shares) |  | 0 |  | 0 | 0 | 0 |  |
Accounting Standards Update 2018-02 |  |  |  |  |  |  |  |
New Accounting Standards |  |  |  |  |  |  |  |
Reclassification of stranded tax effects | $ 168,000 |  | $ 0 |  |  |  |  |
WorkLLama |  |  |  |  |  |  |  |
Equity Method Investment |  |  |  |  |  |  |  |
Percent ownership of equity method investment |  |  |  |  |  |  | 50.00% |
Loss on equity method investment |  | $ (400,000) |  |  | $ (400,000) |  |  |
Equity method investment |  | 8,600,000 |  |  | 8,600,000 |  |  |
Contingent payments liability, maximum |  | 15,000,000.0 |  |  | 15,000,000.0 |  |  |
Contingent payments liability |  | $ 1,500,000 |  |  | $ 1,500,000 |  |  |

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