XML 43 R27.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Stock-based Compensation Expense | Stock-based compensation expense was recorded in the following cost and expense categories consistent with the respective employee or service provider’s related cash compensation (in thousands):
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
Cost of revenue |  |  |  |  |
Subscription and support | $ | 738 |  | $ | 493 |  | $ | 363
Professional services | 465 |  | 411 |  | 349
Operating expenses |  |  |  |  |
Research and development | 2,224 |  | 2,365 |  | 1,924
Sales and marketing | 2,983 |  | 2,075 |  | 1,727
General and administrative | 13,066 |  | 8,903 |  | 6,637
Total | $ | 19,476 |  | $ | 14,247 |  | $ | 11,000
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of our stock options and ESPP purchase rights was estimated assuming no expected dividends and the following weighted-average assumptions:
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
Stock Options |  |  |  |  |
Expected term (in years) | 0.2 - 6.1 |  | 6.0 - 6.1 |  | 6.1
Risk-free interest rate | 1.5% - 2.2% |  | 1.2% - 2.1% |  | 1.4% - 1.9%
Expected volatility | 23.7% - 43.8% |  | 43.0% - 45.3% |  | 42.4% - 47.1%
ESPP |  |  |  |  |
Expected term (in years) | 0.5 |  | — |  | —
Risk-free interest rate | 1.2% |  |  | —% |  |  | —% |
Expected volatility | 28.5% |  |  | —% |  |  | —% |
Schedule of Share-based Payment Award, ESPP, Valuation Assumptions | The fair value of our stock options and ESPP purchase rights was estimated assuming no expected dividends and the following weighted-average assumptions:
| Year ended December 31,
| 2017 |  | 2016 |  | 2015
Stock Options |  |  |  |  |
Expected term (in years) | 0.2 - 6.1 |  | 6.0 - 6.1 |  | 6.1
Risk-free interest rate | 1.5% - 2.2% |  | 1.2% - 2.1% |  | 1.4% - 1.9%
Expected volatility | 23.7% - 43.8% |  | 43.0% - 45.3% |  | 42.4% - 47.1%
ESPP |  |  |  |  |
Expected term (in years) | 0.5 |  | — |  | —
Risk-free interest rate | 1.2% |  |  | —% |  |  | —% |
Expected volatility | 28.5% |  |  | —% |  |  | —% |
Schedule of Stock-Option Activity | The following table summarizes the option activity under the Plans for the year ended December 31, 2017:
| Options |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value
|  |  |  |  |  |  | (in thousands)
Outstanding at December 31, 2016 | 7,532,455 |  | $ | 12.22 |  | 7.2 |  | $ | 19,988
Granted | 2,111,253 |  | 16.10 |  |  |  |
Forfeited | (339,111) |  | 14.93 |  |  |  |
Exercised | (1,158,820) |  | 10.77 |  |  |  |
Outstanding at December 31, 2017 | 8,145,777 |  | $ | 13.33 |  | 7.0 |  | $ | 65,913
Exercisable at December 31, 2017 | 4,607,812 |  | $ | 11.49 |  | 5.7 |  | $ | 45,653
Schedule of Restricted Stock Awards | The following table summarizes the restricted stock award activity under the Plan for the year ended December 31, 2017:
| Number of Shares |  | Weighted-Average Grant Date Fair Value
Unvested at December 31, 2016 | 353,335 |  | $ | 13.40
Granted | — |  | —
Forfeited | — |  | —
Vested | (190,003) |  | 13.40
Unvested at December 31, 2017 | 163,332 |  | $ | 13.40
Schedule of Restricted Stock Units | The following table summarizes the restricted stock unit activity under the Plan for the year ended December 31, 2017:
| Number of Shares |  | Weighted-Average Grant Date Fair Value
Unvested at December 31, 2016 | 381,952 |  | $ | 15.11
Granted | 413,792 |  | 13.95
Forfeited | — |  | —
Vested(1) | (221,672) |  | 14.48
Unvested at December 31, 2017 | 574,072 |  | $ | 14.51

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration