| Summary of Quarterly Results of Operations |
Quarterly results of operations are as follows (in thousands, except per share amounts): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the three months ended: | | Dec. 31,
2014 | | Sept. 30,
2014 | | June 30,
2014 | | March 31,
2014 | | Dec. 31,
2013 | | Sept. 30,
2013 | | June 30,
2013 | | March 31,
2013 | Statements of Operations Data: | | | | | | | | | | | | | | | | Revenue | $ | 31,914 |
| | $ | 31,274 |
| | $ | 30,295 |
| | $ | 29,137 |
| | $ | 28,787 |
| | $ | 27,683 |
| | $ | 26,216 |
| | $ | 24,508 |
| Gross profit | $ | 21,913 |
| | $ | 21,689 |
| | $ | 20,574 |
| | $ | 19,877 |
| | $ | 20,098 |
| | $ | 18,784 |
| | $ | 17,761 |
| | $ | 15,670 |
| (Loss) income from operations | $ | (4,615 | ) | | $ | (481 | ) | | $ | (2,547 | ) | | $ | (942 | ) | | $ | 341 |
| | $ | (1,177 | ) | | $ | (2,305 | ) | | $ | (7,411 | ) | Net (loss) income | $ | (5,133 | ) | | $ | (699 | ) | | $ | (2,536 | ) | | $ | (982 | ) | | $ | 318 |
| | $ | (1,187 | ) | | $ | (2,317 | ) | | $ | (7,419 | ) | Basic and diluted net (loss) income per share | $ | (0.19 | ) | | $ | (0.03 | ) | | $ | (0.09 | ) | | $ | (0.04 | ) | | $ | 0.01 |
| | $ | (0.05 | ) | | $ | (0.09 | ) | | $ | (0.29 | ) |
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