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Stock-Based Compensation and Stock Options - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Shares |  |  |  |
Options outstanding, beginning (in shares) | 950,000 | 600,000 | 775,000 |
Options granted (in shares) | 250,000 | 400,000 | 150,000 |
Options forfeited and canceled (in shares) | (150,000) | (50,000) | (325,000) |
Options outstanding, ending (in shares) | 1,050,000 | 950,000 | 600,000 | 775,000
Weighted-Average Exercise Price |  |  |  |
Options outstanding, weighted average exercise price, beginning (in dollars per share) | $ 8.75 | $ 9.93 | $ 12.78 |
Options granted, weighted average exercise price (in dollars per share) | 15.47 | 6.95 | 8.55 |
Options forfeited and canceled, weighted average exercise price (in dollars per share) | 14.68 | 8.55 | 16.09 |
Options outstanding, weighted average exercise price, ending (in dollars per share) | $ 9.50 | $ 8.75 | $ 9.93 | $ 12.78
Exercisable and fully vested (in shares) | 716,667 |  |  |
Exercisable and fully vested, weighted average exercise price (in dollars per share) | $ 9.31 |  |  |
Options outstanding weighted-average remaining contractual life | 7 years 6 months 11 days | 8 years 5 months 23 days | 8 years 6 months 20 days | 5 years 6 months 11 days
Options exercisable weighted-average remaining contractual life | 7 years 1 month 27 days |  |  |
Vested and expected to vest, outstanding, aggregate intrinsic value (in dollars) | $ 1,920 | $ 0 | $ 0 | $ 120
Vested and expected to vest, exercisable, aggregate intrinsic value (in dollars) | $ 1,344 |  |  |
Outstanding and expected to vest thereafter (in shares) | 333,333 |  |  |
Outstanding and expected to vest thereafter, weighted average exercise price (in dollars per share) | $ 9.92 |  |  |
Outstanding and expected to vest, weighted average remaining contractual life (in years) | 8 years 3 months 22 days |  |  |
Outstanding and expected to vest, aggregate intrinsic value (in dollars) | $ 576 |  |  |

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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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