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Share-Based Compensation (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2018 USD ($) shares | Jun. 30, 2018 USD ($) shares | Sep. 30, 2017 USD ($) | Jun. 30, 2018 shares | Sep. 30, 2018 USD ($) Plan Period $ / shares shares | Sep. 30, 2017 USD ($) | Dec. 31, 2017 shares
Share-based Compensation expenses [Abstract] |  |  |  |  |  |  |  |  |  |
Share-based compensation |  | $ 1,236 |  |  |  |  | $ 28,541 |  |  |
Performance Unit and Option Awards [Abstract] |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding (in shares) | shares |  | 24,942,185 |  |  |  |  | 24,942,185 |  |  |
Manufacturing and Supply [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation expenses [Abstract] |  |  |  |  |  |  |  |  |  |
Share-based compensation |  | $ 32 |  |  |  |  | $ 377 |  |  |
Research and Development [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation expenses [Abstract] |  |  |  |  |  |  |  |  |  |
Share-based compensation |  | 192 |  |  |  |  | 2,378 |  |  |
Selling, General and Administrative [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation expenses [Abstract] |  |  |  |  |  |  |  |  |  |
Share-based compensation |  | $ 1,012 |  |  |  |  | $ 25,786 |  |  |
Discount for Lack of Marketability [Member] |  |  |  |  |  |  |  |  |  |
Valuation Assumptions for Determination of Fair Value [Abstract] |  |  |  |  |  |  |  |  |  |
Valuation assumptions |  | 0.34 |  |  |  |  | 0.34 |  |  |
Volatility [Member] |  |  |  |  |  |  |  |  |  |
Valuation Assumptions for Determination of Fair Value [Abstract] |  |  |  |  |  |  |  |  |  |
Valuation assumptions |  | 0.9 |  |  |  |  | 0.9 |  |  |
Weighted Average Cost of Capital [Member] |  |  |  |  |  |  |  |  |  |
Valuation Assumptions for Determination of Fair Value [Abstract] |  |  |  |  |  |  |  |  |  |
Valuation assumptions |  | 0.2750 |  |  |  |  | 0.2750 |  |  |
Performance Units [Member] |  |  |  |  |  |  |  |  |  |
Performance Unit and Option Awards [Abstract] |  |  |  |  |  |  |  |  |  |
Number of performance units plans | Plan |  |  |  |  |  |  | 2 |  |  |
Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation expenses [Abstract] |  |  |  |  |  |  |  |  |  |
Share-based compensation |  | $ 610 | [1] |  | $ 0 |  | $ 610 | [1] | $ 0 |
Valuation Assumptions for Determination of Fair Value [Abstract] |  |  |  |  |  |  |  |  |  |
Service period |  |  |  |  |  |  | 2 years |  |  |
Additional Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |
Stock granted (in shares) | shares |  | 264,781 |  |  |  | 0 |  |  |  | 0
Estimated grant date fair value |  | $ 3,926 |  |  |  |  | $ 3,926 |  |  |
Stock vested (in shares) | shares |  | 29,802 |  |  |  |  |  |  |  |
Restricted stock unit forfeited (in shares) | shares |  | 0 |  |  |  |  |  |  |  |
Compensation Cost Not yet Recognized [Abstract] |  |  |  |  |  |  |  |  |  |
Unrecognized compensation expense, net of estimated forfeitures |  | $ 3,043 |  |  |  |  | $ 3,043 |  |  |
Term of Unrecognized compensation expense to be recognized |  |  |  |  |  |  | 3 years |  |  |
Restricted Stock Units [Member] | Senior Management and Board [Member] |  |  |  |  |  |  |  |  |  |
Additional Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |
Vesting period |  | 2 years |  |  |  |  |  |  |  |
Restricted Stock Units [Member] | key Employees [Member] |  |  |  |  |  |  |  |  |  |
Additional Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |
Vesting period |  | 3 years |  |  |  |  |  |  |  |
Stock Options [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation expenses [Abstract] |  |  |  |  |  |  |  |  |  |
Share-based compensation | [1] | $ 626 |  |  |  |  | $ 633 |  |  |
Valuation Assumptions for Determination of Fair Value [Abstract] |  |  |  |  |  |  |  |  |  |
Service period |  |  |  |  |  |  | 3 years |  |  |
Additional Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 3 years |  |  |
Stock options granted (in shares) | shares |  |  |  |  |  |  | 1,033,042 |  |  | 0
Stock options, estimated grant date fair value |  | $ 11,155 |  |  |  |  | $ 11,155 |  |  |
Stock options vested (in shares) | shares |  |  |  |  |  |  | 28,666 |  |  |
Contractual term |  |  |  |  |  |  | 10 years |  |  |
Stock options forfeited (in shares) | shares |  | 0 |  |  |  |  |  |  |  |
Fair Value Assumptions [Abstract] |  |  |  |  |  |  |  |  |  |
Expected dividend yield |  |  |  |  |  |  | 0.00% |  |  |
Expected volatility |  |  |  |  |  |  | 90.00% |  |  |
Number of vesting periods | Period |  |  |  |  |  |  | 2 |  |  |
Compensation Cost Not yet Recognized [Abstract] |  |  |  |  |  |  |  |  |  |
Unrecognized compensation expense, net of estimated forfeitures |  | $ 9,770 |  |  |  |  | $ 9,770 |  |  |
Term of Unrecognized compensation expense to be recognized |  |  |  |  |  |  | 3 years |  |  |
Stock Options [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Additional Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |
Stock options grand, exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 6.54 |  |  |
Fair Value Assumptions [Abstract] |  |  |  |  |  |  |  |  |  |
Expected term (years) |  |  |  |  |  |  | 5 years 9 months 18 days |  |  |
Risk-free rate |  |  |  |  |  |  | 2.80% |  |  |
Stock Options [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Additional Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |
Stock options grand, exercise price (in dollars per share) | $ / shares |  |  |  |  |  |  | $ 18.67 |  |  |
Fair Value Assumptions [Abstract] |  |  |  |  |  |  |  |  |  |
Expected term (years) |  |  |  |  |  |  | 6 years 1 month 6 days |  |  |
Risk-free rate |  |  |  |  |  |  | 2.90% |  |  |
Stock Options [Member] | Senior Management and Board [Member] |  |  |  |  |  |  |  |  |  |
Additional Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 3 years |  |  |
Stock Options [Member] | key Employees [Member] |  |  |  |  |  |  |  |  |  |
Additional Disclosures [Abstract] |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  | 3 years |  |  |
Nonvoting Common Stock [Member] |  |  |  |  |  |  |  |  |  |
Share-based Compensation expenses [Abstract] |  |  |  |  |  |  |  |  |  |
Share-based compensation |  | $ 0 | [2] | $ 27,298 |  |  | $ 27,298 | [2] |  |
Performance Unit and Option Awards [Abstract] |  |  |  |  |  |  |  |  |  |
Fair market value of non-voting shares at shares granted date |  |  |  | 19,934 |  |  |  |  |  |
Withholding taxes on share-based compensation |  |  |  | $ 7,364 |  |  |  |  |  |
Number of common shares issued (in shares) | shares |  |  |  | 4,922,353 |  |  |  |  |  |
Common stock, shares outstanding (in shares) | shares |  |  |  | 4,922,353 |  | 4,922,353 |  |  |  |
[1] | Share-Based Compensation Equity Awards
[2] | Non-Voting Common Share Issuance

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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 (f)(2)(ii) -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 Expected term of share-based compensation awards, 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 (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + 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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