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Net Income Per Share - Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share (Detail) - shares | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Weighted average number of common shares used for basic earnings per share | 45,832,297 | 45,471,083
Effect of potential dilutive shares: |  |
Weighted average number of common shares and potential dilutive shares used for diluted earnings per share | 45,832,297 | 45,653,471
Warrants [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 4,877,783 | 4,053,476
Employee Stock Option [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 16,667 | 126,667
Restricted Stock Units (RSUs) [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 271,763 | 0
Performance Shares [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 478,739 | 0
Warrants [Member] |  |
Effect of potential dilutive shares: |  |
Effect of potential dilutive shares | 0 | 0
Employee Stock Option [Member] |  |
Effect of potential dilutive shares: |  |
Effect of potential dilutive shares | 0 | 0
Restricted Stock Units (RSUs) [Member] |  |
Effect of potential dilutive shares: |  |
Effect of potential dilutive shares | 0 | 45,713
Performance Shares [Member] |  |
Effect of potential dilutive shares: |  |
Effect of potential dilutive shares | 0 | 136,675

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e1505-109256 + Details
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