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Selected Quarterly Financial Data (Unaudited) Selected Quarterly Financial Data-Additional Information (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Net revenue | $ 31,574 | $ 31,765 | $ 29,773 | $ 26,534 | $ 24,830 | $ 27,795 | $ 24,420 | $ 20,683 | $ 119,646 | $ 97,728 | $ 71,937 |
| Gross Profit | 19,124 | 19,831 | 17,296 | 16,712 | 15,704 | 17,467 | 15,122 | 12,353 | 72,963 | 60,646 | 45,247 |
| Net loss | $ (2,647) | $ (4,882) | $ (2,904) | $ (2,300) | $ (4,581) | $ 450 | $ (2,559) | $ (6,562) | $ (12,733) | $ (13,252) | $ (22,024) |
| Earnings Per Share, Basic | $ (0.08) | $ (0.14) | $ (0.09) | $ (0.07) | $ (0.14) | $ 0.01 | $ (0.08) | $ (0.20) | $ (0.37) | $ (0.40) | $ (0.68) |
| Earnings Per Share, Diluted | $ (0.08) | $ (0.14) | $ (0.09) | $ (0.07) | $ (0.14) | $ 0.01 | $ (0.08) | $ (0.20) | $ (0.37) | $ (0.40) | $ (0.68) |