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Quarterly financial data (unaudited) | 12 Months Ended
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Dec. 31, 2012
Quarterly financial data (unaudited) |
Quarterly financial data (unaudited) | 16. Quarterly financial data (unaudited) Summarized unaudited quarterly financial data are as follows:
|  | 2012 |
--- | --- | --- | ---
|  | March 31 |  | June 30 |  | September 30 |  | December 31 |
Revenue |  | $ | 24,187 |  | $ | 24,302 |  | $ | 26,017 |  | $ | 28,000 |
Income from operations |  | $ | 2,407 |  | $ | 2,236 |  | $ | 4,129 |  | $ | 2,074 |
Net income attributable to common stockholders |  | $ | 1,657 |  | $ | 1,461 |  | $ | 2,777 |  | $ | 1,400 |
Basic earnings per share |  | $ | 0.05 |  | $ | 0.04 |  | $ | 0.08 |  | $ | 0.04 |
Diluted earnings per share |  | $ | 0.05 |  | $ | 0.04 |  | $ | 0.07 |  | $ | 0.04 |
|  | 2011 |
--- | --- | --- | ---
|  | March 31 |  | June 30 |  | September 30 |  | December 31 |
Revenue |  | $ | 21,028 |  | $ | 22,943 |  | $ | 24,688 |  | $ | 25,899 |
Income from operations |  | $ | 1,729 |  | $ | 2,427 |  | $ | 2,981 |  | $ | 4,040 |
Net (loss) income attributable to common stockholders |  | $ | (148 | ) | $ | 1,293 |  | $ | 1,662 |  | $ | 1,855 |
Basic (loss) earnings per share |  | $ | (0.03 | ) | $ | 0.06 |  | $ | 0.05 |  | $ | 0.06 |
Diluted (loss) earnings per share |  | $ | (0.03 | ) | $ | 0.05 |  | $ | 0.05 |  | $ | 0.05 |
Earnings per share are computed separately for each quarter and the full year using the respective weighted average shares. Therefore, the sum of the quarterly (loss) earnings per share amounts may not equal the annual amounts reported. During the quarter ended December 31, 2012, the Company recorded certain out-of-period adjustments that increased net income attributable to common stockholders by $243. The impact of these out-of-period adjustments is not considered material, individually and in the aggregate, to any of the current or prior quarterly or annual periods.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=20225539&loc=d3e1280-108306 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 30 -Subparagraph a-j -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 23, 24 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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