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v3.20.1

Stock Options - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Jun. 07, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Employee Service Share-Based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized | $ 1.3 |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 26 months |  |
Share-based Payment Arrangement, Option And Stock Appreciation Rights (SARs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares counted against Share Reserve |  |  | 1
Number of shares added back, expiration or termination |  |  | 1
Number of shares added back, withheld, tendered or exchanged |  |  | 1
Share-based Payment Arrangement, Excluding Than Option And Stock Appreciation Rights (SARs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares counted against Share Reserve |  |  | 2
Number of shares added back, expiration or termination |  |  | 2
Number of shares added back, withheld, tendered or exchanged |  |  | 2
Employee Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 0.00% | 0.00% |
Exercise of stock options (in shares) |  | 0 |
2013 Stock Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Shares Authorized |  |  | 5,858,892

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- Definition The number of shares that would be added back to share reserve if any shares are withheld, tendered or exchanged by a participant in the plan as full or partial payment of the exercise price or in satisfaction of the participant's tax withholding obligations. + References No definition available. + Details
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