XML 24 R34.htm IDEA: XBRL DOCUMENT
v3.20.1

Stock-Based Compensation (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-Based Compensation Expense Related to Stock Options, PSUs, RSUs and Restricted Stock | The following table summarizes stock-based compensation expense related to stock options, performance stock units (“PSUs”), restricted stock units (“RSUs”) and restricted stock for the three months ended March 31, 2020 and 2019:
|  | Three Months Ended |
|  | March 31, |
(In thousands) |  | 2020 |  |  | 2019 |
Stock-based compensation expense included in cost of sales |  | $ | 115 |  |  | $ | 104 |
Selling, general and administrative expense |  |  | 1,075 |  |  |  | 1,063 |
Research and development expense |  |  | 601 |  |  |  | 692 |
Stock-based compensation expense included in operating expenses |  |  | 1,676 |  |  |  | 1,755 |
Total stock-based compensation expense |  |  | 1,791 |  |  |  | 1,859 |
Tax benefit for expense associated with stock options, PSUs, RSUs and restricted stock |  |  | (427 | ) |  |  | (443 | )
Total stock-based compensation expense, net of tax |  | $ | 1,364 |  |  | $ | 1,416 |
Summary of PSUs, RSUs and Restricted Stock Outstanding | The following table summarizes PSUs, RSUs and restricted stock outstanding as of December 31, 2019 and March 31, 2020 and the changes that occurred during the three months ended March 31, 2020.
|  | Number of Shares (in thousands) |  |  | Weighted Avg. Grant Date Fair Value (per share) |
Unvested PSUs, RSUs and restricted stock outstanding, December 31, 2019 |  |  | 1,891 |  |  | $ | 14.58 |
PSUs, RSUs and restricted stock granted |  |  | 394 |  |  | $ | 8.18 |
PSUs, RSUs and restricted stock vested |  |  | (13 | ) |  | $ | 12.32 |
PSUs, RSUs and restricted stock forfeited |  |  | (422 | ) |  | $ | 21.12 |
Unvested PSUs, RSUs and restricted stock outstanding, March 31, 2020 |  |  | 1,850 |  |  | $ | 11.75 |
Summary of Stock Options Outstanding | The following table summarizes stock options outstanding as of December 31, 2019 and March 31, 2020 and the changes that occurred during the three months ended March 31, 2020:
|  | Number of Stock Options (in thousands) |  |  | Weighted Avg. Exercise Price (per share) |  |  | Weighted Avg. Remaining Contractual Life (in years) |  |  | Aggregate Intrinsic Value (in thousands) |
Stock options outstanding, December 31, 2019 |  |  | 3,572 |  |  | $ | 22.88 |  |  |  | 3.4 |  |  | $ | — |
Stock options exercised |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Stock options forfeited |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Stock options expired |  |  | (125 | ) |  | $ | 23.49 |  |  |  |  |  |  |  |  |
Stock options outstanding, March 31, 2020 |  |  | 3,447 |  |  | $ | 22.86 |  |  |  | 3.1 |  |  | $ | — |
Stock options exercisable, March 31, 2020 |  |  | 3,444 |  |  | $ | 22.86 |  |  |  | 3.1 |  |  | $ | — |

X
- Definition Schedule of share based compensation performance stock units restricted stock units and restricted stock activity. + References No definition available. + Details
Name: | adtn_ScheduleOfShareBasedCompensationPerformanceStockUnitsRestrictedStockUnitsAndRestrictedStockActivityTableTextBlock
Namespace Prefix: | adtn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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 allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration