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Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2011
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 30,905 | $ 25,633 | $ 25,902 | $ 22,533 | $ 20,250 | $ 24,329 | $ 33,595 | $ 25,012 | $ 104,973 | $ 103,186 | $ 74,235
Africa [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 235 | 371 | 1,677
Asia [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 17,048 | 17,339 | 16,134
Australia and New Zealand [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 29 | 2,840 | 62
Canada [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 7,084 | 4,626 | 3,059
Central America [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 4,633 | 224 | 76
Mexico [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 89 | 112 | 930
Middle East [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 14,834 | 16,264 | 11,857
South America [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 3,299 | 5,407 | 6,050
US [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 55,695 | 55,432 | 33,358
Western Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Breakdown of net sales by geographic area |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 2,027 | $ 571 | $ 1,032

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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