| Mar'19 | Dec'18 | Sep'18 | Jun'18 | Mar'18 | Dec'17 | Sep'17 | Jun'17 | Mar'17 | Dec'16 | Sep'16 | Jun'16 | Mar'16 | Dec'15 | Sep'15 | Jun'15 | Mar'15 | Dec'14 | Sep'14 | Jun'14 | Mar'14 | Dec'13 | Sep'13 | Jun'13 | Mar'13 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Operating activities | ||||||||||||||||||||||||
Net income (loss) | ||||||||||||||||||||||||
40,904 | 43,840 | 19,176 | 18,499 | 15,600 | 15,455 | 12,954 | 9,697 | 6,480 | 12,298 | 8,287 | 7,701 | 9,218 | -1,652 | 2,922 | 4,494 | 4,464 | 8,156 | 6,505 | 5,473 | 4,435 | 3,503 | 0 | 0 | 0 |
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: | ||||||||||||||||||||||||
Depreciation expense | ||||||||||||||||||||||||
4,086 | 3,946 | 3,835 | 3,777 | 3,726 | 3,686 | 3,619 | 3,507 | 3,480 | 3,318 | 3,182 | 3,178 | 3,090 | 2,926 | 2,813 | 2,623 | 2,542 | 2,547 | 2,472 | 2,362 | 2,297 | 2,201 | 0 | 0 | 0 |
Amortization of intangible assets | ||||||||||||||||||||||||
5,638 | 5,464 | 5,613 | 5,546 | 5,428 | 5,212 | 5,090 | 4,977 | 4,894 | 4,598 | 3,754 | 2,918 | 2,083 | 1,474 | 1,274 | 1,023 | 718 | 491 | 431 | 380 | 349 | 319 | 0 | 0 | 0 |
Loss on disposal of fixed assets | ||||||||||||||||||||||||
- | -5 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Provision for doubtful accounts | ||||||||||||||||||||||||
776 | 839 | 1,084 | 837 | 749 | 815 | 523 | 442 | 363 | 345 | 377 | 340 | 393 | 345 | 239 | 238 | 241 | 229 | 318 | 221 | 148 | 159 | 0 | 0 | 0 |
Investment discount and premium amortization, net | ||||||||||||||||||||||||
-620 | -534 | 0 | 0 | 0 | - | - | - | - | 339 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - |
Stock-based compensation | ||||||||||||||||||||||||
13,705 | 13,511 | 12,999 | 12,598 | 12,186 | 12,105 | 11,628 | 10,583 | 9,801 | 8,370 | 7,631 | 7,456 | 7,008 | 7,034 | 6,683 | 6,214 | 5,943 | 5,341 | 5,106 | 4,707 | 4,169 | 3,760 | 0 | 0 | 0 |
Tax benefit from business acquisition | ||||||||||||||||||||||||
- | - | - | - | - | 2,257 | 2,415 | 2,109 | 1,993 | 9,402 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - |
Warrant liability expense | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 709 | 0 | 0 | 0 |
Changes in assets and liabilities: | ||||||||||||||||||||||||
Accounts receivable, net | ||||||||||||||||||||||||
5,674 | 4,503 | 5,579 | 4,304 | 4,080 | 5,116 | 5,186 | 3,351 | 3,142 | 3,765 | 2,499 | 1,269 | 1,267 | 1,127 | 3,090 | 5,055 | 3,012 | 5,331 | 3,464 | 1,344 | 2,375 | 2,104 | 0 | 0 | 0 |
Inventories | ||||||||||||||||||||||||
6,079 | 6,341 | 8,992 | 10,897 | 10,399 | 9,324 | 160 | -1,982 | -3,980 | 1,589 | 8,485 | 8,516 | 6,596 | 3,488 | 579 | 290 | 581 | -1,025 | -49 | 3,069 | 4,412 | 2,723 | 0 | 0 | 0 |
Prepaid expenses and other current assets | ||||||||||||||||||||||||
3,847 | 1,729 | 1,627 | 2,872 | 1,854 | 593 | 166 | -869 | -2,704 | -1,184 | -863 | -491 | 2,243 | 1,443 | 487 | 341 | 452 | 323 | 193 | 500 | -203 | -111 | 0 | 0 | 0 |
Other assets | ||||||||||||||||||||||||
-1,140 | 450 | -1,072 | -561 | -378 | 201 | 984 | 561 | 555 | 307 | 358 | 495 | 448 | 264 | 432 | 157 | 139 | 209 | 14 | -1,634 | -1,339 | 233 | 0 | 0 | 0 |
Accounts payable | ||||||||||||||||||||||||
1,976 | 1,940 | 4,691 | 6,045 | 2,583 | 6,370 | 1,130 | -909 | -2,551 | -32 | 2,606 | 4,185 | 2,479 | 615 | 1,084 | 812 | 1,179 | 1,698 | -2,415 | -3,441 | 1,136 | -1,221 | 0 | 0 | 0 |
Accrued liabilities | ||||||||||||||||||||||||
-379 | -67 | 11 | -878 | -862 | -441 | -97 | -168 | -140 | 1,999 | 1,291 | 1,018 | 774 | 248 | -660 | -1,212 | -1,751 | -2,110 | -614 | -140 | -865 | 620 | 0 | 0 | 0 |
Deferred revenue | ||||||||||||||||||||||||
948 | 1,086 | 917 | 1,222 | 1,311 | 1,213 | 1,941 | 1,562 | 1,225 | 1,362 | 202 | 280 | 374 | 258 | 447 | 304 | 163 | 199 | 106 | 40 | -269 | 102 | 0 | 0 | 0 |
Other long-term liabilities | ||||||||||||||||||||||||
644 | 1,378 | 295 | -113 | -77 | -156 | -31 | 61 | -630 | -653 | -665 | -605 | -183 | -512 | -316 | -380 | -374 | -44 | -43 | -2,307 | -1,351 | -1,155 | 0 | 0 | 0 |
Net cash provided by (used in) operating activities | ||||||||||||||||||||||||
29,774 | 34,950 | 34,026 | 30,679 | 25,437 | 27,427 | 27,834 | 26,695 | 24,138 | 18,078 | 7,090 | 7,190 | 4,988 | 4,414 | 9,829 | 7,861 | 8,520 | 11,248 | 7,692 | 3,779 | 5,158 | 3,668 | 0 | 0 | 0 |
Purchases of available-for-sale investments | ||||||||||||||||||||||||
70,273 | 62,603 | 75,862 | 80,235 | 81,619 | 76,796 | 0 | 0 | 0 | - | - | - | - | 50,619 | 52,174 | 53,580 | 55,569 | 89,844 | 0 | 0 | 0 | - | - | - | - |
Proceeds from sales of available-for-sale investments | ||||||||||||||||||||||||
4,600 | 3,800 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | 2,850 | 0 | 0 | 0 | - | - | - | - |
Proceeds from maturities of available-for-sale investments | ||||||||||||||||||||||||
70,849 | 62,650 | 60,550 | 55,262 | 47,420 | 43,780 | 42,925 | 35,263 | 36,401 | 42,203 | 49,465 | 53,271 | 61,409 | 65,142 | 0 | 0 | 0 | - | - | - | - | - | - | - | - |
Purchases of property and equipment | ||||||||||||||||||||||||
6,567 | 6,288 | 4,863 | 4,185 | 3,922 | 3,952 | 3,905 | 3,129 | 3,172 | 2,682 | 2,635 | 3,016 | 3,396 | 3,772 | 3,479 | 3,407 | 3,129 | 2,710 | 3,043 | 2,728 | 2,428 | 3,470 | 0 | 0 | 0 |
Business acquisitions, net of cash acquired | ||||||||||||||||||||||||
0 | - | - | - | - | 9,258 | 7,881 | 7,881 | 8,653 | 32,891 | 32,891 | 32,891 | 32,155 | 8,380 | 0 | 0 | 0 | - | - | - | - | - | - | - | - |
Net cash used in investing activities | ||||||||||||||||||||||||
-14,497 | -3,852 | -19,958 | -26,873 | -34,507 | -42,271 | -28,463 | -20,061 | -8,429 | -11,697 | 3,168 | 3,039 | 2,757 | 4,389 | -5,480 | -8,782 | -23,377 | -71,905 | -76,218 | -72,180 | -61,307 | -3,617 | 0 | 0 | 0 |
Proceeds from exercise of options for common stock | ||||||||||||||||||||||||
9,197 | 10,976 | 16,398 | 12,339 | 15,513 | 16,959 | 11,706 | 10,501 | 6,856 | 3,437 | 3,254 | 1,361 | 985 | 1,360 | 2,908 | 2,880 | 3,703 | 6,411 | 4,709 | 4,538 | 3,608 | 446 | 0 | 0 | 0 |
Payments for withholding taxes related to net share settlement of equity awards | ||||||||||||||||||||||||
5,600 | 7,367 | 7,321 | 7,546 | 7,081 | 5,534 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Repurchase of common stock | ||||||||||||||||||||||||
18,946 | 23,872 | 15,957 | 11,050 | 7,448 | 1,821 | 1,821 | 1,821 | 3,326 | 3,242 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - |
Proceeds from notes payable | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1,145 | 0 | 0 | 0 |
Repayment of notes payable | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | 913 | 774 | 796 | 842 | 915 | 1,013 | 1,089 | 1,108 | 1,138 | 1,199 | 1,379 | 1,435 | 1,338 | 0 | 0 | 0 |
Proceeds from revolving credit facility | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | 5,000 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - |
Payment of debt issuance costs | ||||||||||||||||||||||||
- | 113 | 0 | 0 | 0 | - | - | - | - | 89 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - |
Net cash used in financing activities | ||||||||||||||||||||||||
-15,349 | -20,376 | -6,993 | -6,370 | 871 | 9,604 | 3,462 | 558 | -4,256 | -807 | -3,429 | -4,638 | -5,703 | -8,575 | -2,974 | -275 | 2,686 | 5,364 | 3,528 | 68,724 | 68,439 | 65,809 | 0 | 0 | 0 |
Effect of exchange rate changes on cash and cash equivalents | ||||||||||||||||||||||||
-108 | -102 | -336 | -266 | 4 | 214 | 98 | 31 | -286 | -340 | 105 | 36 | 325 | 115 | -88 | -37 | -77 | -66 | -37 | 25 | 22 | -9 | 0 | 0 | 0 |
Net change in cash and cash equivalents | ||||||||||||||||||||||||
-180 | 10,620 | 6,739 | -2,830 | -8,195 | -5,026 | 2,931 | 7,223 | 11,167 | 5,234 | 6,934 | 5,627 | 2,367 | 343 | 1,287 | -1,233 | -12,248 | -55,359 | -65,035 | 348 | 12,312 | 65,851 | 0 | 0 | 0 |
Supplemental disclosure of cash flow information | ||||||||||||||||||||||||
Cash paid for interest | ||||||||||||||||||||||||
201 | 145 | 97 | 60 | 48 | 57 | 105 | 163 | 208 | 204 | 180 | 140 | 95 | 101 | 123 | 175 | 185 | 188 | 192 | 372 | 437 | 461 | 0 | 0 | 0 |
Cash paid for taxes | ||||||||||||||||||||||||
1,176 | 1,159 | 1,160 | 1,143 | 1,447 | 1,292 | 1,377 | 1,327 | 937 | 1,115 | 1,258 | 1,332 | 955 | 831 | 450 | 267 | 219 | 246 | 249 | 192 | 196 | 153 | 0 | 0 | 0 |
Supplemental schedule of non-cash investing and financing activities | ||||||||||||||||||||||||
Settlement of accounts receivable and other assets in business combinations | ||||||||||||||||||||||||
0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Landlord paid tenant improvements | ||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0 | - | - | - | - | - | - | - | - |
Purchases of property and equipment financed by accounts payable | ||||||||||||||||||||||||
254 | 400 | 644 | 757 | 465 | 351 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Net unrealized gains (losses) on available-for-sale investments | ||||||||||||||||||||||||
0 | - | - | - | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Net unrealized losses on available-for-sale investments | ||||||||||||||||||||||||
- | - | - | - | - | - | - | 0 | -32 | - | -19 | 28 | 20 | -14 | -28 | -20 | 26 | -47 | 0 | 0 | 0 | - | - | - | - |