Thanks, Kevin. As Kevin has pointed out in his commentary, we are very pleased with the overall financial performance in terms of topline revenue and gross margin improvement in the quarter. Our focus on sales force expansion, infrastructure support of the sales organization, and overall market expansion continues to be at the forefront of our growth strategy. However, this quarter we'd like to also highlight a number of important fundamental and to treat the strategic trends in our business that lead us to remain bullish on our growth story and with that, increase guidance. But before I go into that detail, let's look at some of the important financial and qualitative highlights for the second quarter as adjusted for topic 606. Highlights for the first quarter include revenue growth of 55% year-over-year and sequential growth of 16%. Gross margins of 73.2%, an increase sequentially of 1.4 percentage points, another successful quarter of AT contracting efforts, again ahead of our own internal expectations leading to some early AT pilot onboarding wins. And finally, a completed buildout of our sales operations and sales expansion teams for the year for our own internal expectations and external guidance. Taking a more detailed look at the first quarter results as adjusted for topic 606; revenue for the three quarters ended June 30, 2018 was $35.5 million, an increase of 55% year-over-year and 16% sequentially. Sales force productivity levels continue to rise augmented by the fact most of the additional sales rep hires forecasted for the year are already onboard as of June 30. And as I mentioned before, we thought it's important to spend some time on this earnings call going into more detail on the positive trends, some of which we've shared in the past and some new ones that we are seeing in our business that support our confidence in revenue guidance. These include, volume to price revenue growth which remained at an 80%-20% ratio indicating continued strength in our pricing where low pay or non-contract payers are shifting to contracted rates. New store same-store unit growth trends also remain at a healthy 50-50 mix ratio. We see this mix as consistent with our strategy of focusing on large volume accounts with large integrated systems that also helps with ongoing organic growth. To that end, some of these new store accounts that came online in Q2 contributed meaningful volume within the quarter. And finally, for both new and existing accounts piloting AT, we saw material increases to XT volumes indicating the potential for large XT pull-through as we have anticipated. These important trends for our business speak to our ability to aggressively target and convert large integrated systems with our full service product offerings inclusive of our support of EMR integrations, customer experience resources and workflow tools. Many of these processes and services are mandatory requirements for integrated networks which speak to some of our components of our competitive pillars. Turning our attention to the rest of the P&L, gross margins for the second quarter of 2018 was 73.2%, compared to 70.6%, a 2.6 percentage point improvement over the same period in 2017. Margin expansion is again driven in part by continued, cost reductions through scaling and productivity gains through our proprietary algorithms. This quarter however, we'd also like to emphasize two other trends on our business contributing to this margin expansion. First, we are benefiting from higher mix of contracted revenue; and secondly, improved operational efforts in collections have patient deductibles and contracted payments from health plans. These outcome support our ongoing guidance of 20% of revenue growth coming from price through the end of the year. Operating expenses for the second quarter of 2018 were $37.7 million, an increase of 68% compared to $22.5 million for the same period of the prior year. As in the prior quarter, a significant amount of this incremental growth can be directly attributed to our continued focus on salesforce expansion filling out a majority of our internal sales and sales support hiring needs in the first half of the year ahead of our guidance and internal expectations. This hire spend has already paid dividend here in the second quarter as these new reps are showing levels of productivity in advance of our own internal modeling projections. For additional context and color, we thought investors would like to know that 30% of our Q2 OpEx and 60% of our year-over-year incremental OpEx can be directly attributed to investments into our three to five year revenue growth strategy. The remaining spend above guidance is directly associated with over delivery on topline and margin growth. Examples of this incremental spend includes commissions, additional bonus adjustments and bad debt expense. Finally, we continue to run stock compensation expense at a rate higher than planned or external guidance given the stock price growth during the year. The net loss for the second quarter of 2018 was $12.2 million, or a loss of $0.51 per share, compared with a net loss of $6.8 million, or a loss of $0.29 per share, for the same period of the prior year. Turning to our guidance for the remainder of 2018. Based on the aforementioned positive trends in our business, improving salesforce productivity levels and our aggressive hiring in the first half of the year, we are raising our 2018 revenue guidance range to $138 million to $141 million from $128.5 million to $133.5 million representing annual growth of 45% to 48%. We are also raising our sales productivity guidance another $1.25 million at scale from $2.25 million to $2.5 million. We continue to see strength in both new reps getting to productivity faster and then overall reps achieving higher unit targets in existing territories. As for quarterly patterning of sales, we again strongly encourage investors to review historical sequential trends as they build their models, inclusive of summer seasonality for Q3 and understand that new quota carrying reps that have recently been hired or in the process of being trained will not achieve meaningful productivity levels until at least Q4 of this year. Summer seasonalities are real trend for us as both patients and physicians take vacations on top of the two loss booking days due to holiday breaks during the quarter. Gross margin for 2018 is expected to range from 73% to 74%, up from prior guidance of 71.5% to 72.5%. We also remain very confident in our ability to ultimately achieve gross margins in the range of 75% to 80%. Finally, we are raising operating expense projections to a range of $143 million to $147 million, including $16 million to $18 million for research and development and $127 million to $129 million for SG&A. It is of importance to note here that our decision to increase spending in the first half of '18 and now through guidance in the second half of '18 can be directly attributed to our improved confidence and visibility that these investments have and will continue to support our topline growth objectives. We would also take this opportunity to reiterate our belief that cash-on-hand will enable us to see as what we see is a large and growing market opportunity. We'd now like to open the call to questions. Joining me for Q&A is Kevin King, President and CEO; and Derrick Sung, our Executive Vice President of Strategy and Corporate Development. We would now like to open the call up for your questions. Operator?