Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Data (Details)

v3.8.0.1
Selected Quarterly Financial Data (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Revenue:                      
On demand $ 180,104 $ 161,578 $ 154,727 $ 146,213 $ 141,627 $ 140,883 $ 136,610 $ 123,411 $ 642,622 $ 542,531 $ 450,962
On premise 662 648 659 675 695 682 687 772 2,644 2,836 2,970
Professional and other 6,914 6,832 5,920 6,031 6,749 6,390 5,422 4,200 25,697 22,761 14,588
Total revenue 187,680 169,058 161,306 152,919 149,071 147,955 142,719 128,383 670,963 568,128 468,520
Gross profit 114,167 99,710 93,762 89,877 87,707 83,844 80,641 73,635 397,516 325,827 269,907
Net income (loss) $ (20,865) $ 6,834 $ 6,213 $ 8,195 $ 7,361 $ 4,210 $ 2,083 $ 2,996 $ 377 $ 16,650 $ (9,218)
Net (loss) income per share attributable to common stockholders                      
Basic (in dollars per share) $ (0.26) $ 0.09 $ 0.08 $ 0.10 $ 0.09 $ 0.05 $ 0.03 $ 0.04 $ 0.00 $ 0.22 $ (0.12)
Diluted (in dollars per share) $ (0.26) $ 0.08 $ 0.08 $ 0.10 $ 0.09 $ 0.05 $ 0.03 $ 0.04 $ 0.00 $ 0.21 $ (0.12)