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Quarterly Financial Results (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Schedule of quarterly financial information | Financial information for interim periods was as follows:
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
| (in thousands, except per share amounts)
2013 |  |  |  |  |  |  |
Product sales | $ | 25,216 |  |  | $ | 25,886 |  |  | $ | 20,331 |  |  | $ | 18,862 |
Service sales | 14,711 |  |  | 17,311 |  |  | 19,885 |  |  | 20,086 |
Gross profit | 15,769 |  |  | 18,026 |  |  | 16,527 |  |  | 15,390 |
Net income (loss) | $ | 1,963 |  |  | $ | 1,549 |  |  | $ | 1,386 |  |  | $ | (365 | )
Net income (loss) per share (a): |  |  |  |  |  |  |
Basic | $ | 0.13 |  |  | $ | 0.10 |  |  | $ | 0.09 |  |  | $ | (0.02 | )
Diluted | $ | 0.13 |  |  | $ | 0.10 |  |  | $ | 0.09 |  |  | $ | (0.02 | )
2012 |  |  |  |  |  |  |
Product sales | $ | 17,083 |  |  | $ | 21,041 |  |  | $ | 24,529 |  |  | $ | 28,024 |
Service sales | 9,645 |  |  | 10,978 |  |  | 14,293 |  |  | 11,519 |
Gross profit | 9,943 |  |  | 12,451 |  |  | 15,490 |  |  | 17,090 |
Net (loss) income | (1,375 | ) |  | 453 |  |  | 1,745 |  |  | 2,757 |
Net (loss) income per share (a): |  |  |  |  |  |  |
Basic | $ | (0.09 | ) |  | $ | 0.03 |  |  | $ | 0.12 |  |  | $ | 0.19 |
Diluted | $ | (0.09 | ) |  | $ | 0.03 |  |  | $ | 0.12 |  |  | $ | 0.18 |
(a) | Net income (loss) per share is computed independently for each of the quarters. Therefore, the net income (loss) per share for the four quarters may not equal the annual net income (loss) per share data.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + 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 + Details
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