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Earnings per share | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Earnings per share | 4. Earnings per share The Company computes earnings (loss) per share by applying the guidance stated in ASC 260, Earnings per Share. The treasury stock method has been used to compute earnings (loss) per share. The Company has issued warrants (“Private Placement Warrants”) that represent the right to purchase shares of the Company’s common stock, stock appreciation rights (“SAR”), and restricted stock, all of which have been evaluated for their potentially dilutive effect under the treasury stock method. Refer to Note 11, “Stockholders’ equity” for a further description of the Private Placement Warrants and Note 10, “2012 Incentive compensation plan” for a further description of the SAR and restricted stock. The computations of basic and diluted earnings (loss) per share as of December 31, 2015, 2014 and 2013, were as follows:
|  | 2015 |  |  | 2014 |  |  | 2013 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 14,278 |  |  | $ | 23,726 |  |  | $ | (18,760 | )
Change in the value of Private Placement Warrants |  |  | (9,299 | ) |  |  | (6,169 | ) |  |  | — |
|  | $ | 4,979 |  |  | $ | 17,557 |  |  | $ | (18,760 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding-basic |  |  | 10,808,005 |  |  |  | 10,706,780 |  |  |  | 9,779,457 |
Incremental shares from assumed exercise of Private Placement Warrants, SAR, restricted stock |  |  | 265,642 |  |  |  | 424,837 |  |  |  | — |
Weighted average common shares outstanding-diluted |  |  | 11,073,647 |  |  |  | 11,131,617 |  |  |  | 9,779,457 |
Earnings (loss) per share of common stock — basic and diluted: |  |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) per share of common stock — basic |  | $ | 1.32 |  |  | $ | 2.22 |  |  | $ | (1.92 | )
Earnings (loss) per share of common stock — diluted |  | $ | 0.45 |  |  | $ | 1.58 |  |  | $ | (1.92 | )
As of December 31, 2015, SARs were excluded from the diluted EPS calculation because they have an anti-dilutive effect under the treasury stock method. As of December 31, 2013, due to the loss reported in the consolidated statements of operating results, any potentially issuable shares of Company common stock associated with the Private Placement Warrants, SAR and restricted stock granted were not included in the dilutive EPS calculation. These potential shares were excluded from the diluted EPS calculation because they have an anti-dilutive effect under the treasury stock method.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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