Equity Transactions - Narrative (Details) - USD ($) |
3 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2019 |
Jun. 25, 2018 |
Jan. 18, 2018 |
Dec. 21, 2017 |
Mar. 31, 2016 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Stock repurchase program, authorized amount | $ 50,000,000.0 | ||||
| Stock repurchase program, remaining authorized amount | $ 44,800,000 | ||||
| Change in value | $ 1,100,000 | ||||
| Twenty Thirteen Equity Incentive Plan [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Number of shares authorized (in shares) | 11,000,000 | ||||
| Shares available for grant | 7,070,298 | ||||
| Equity Incentive Plan, 2017 | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Number of shares authorized (in shares) | 2,000,000 | 6,500,000 | |||
| Employee Stock Option | Twenty Thirteen Equity Incentive Plan [Member] | |||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||
| Shares available for grant | 2,097,846 |
| X | ||||||||||
- Definition Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of stock repurchase plan authorized. No definition available.
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- Definition Amount remaining of a stock repurchase plan authorized. No definition available.
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