XML 51 R34.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Stock Compensation Plans (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Details of Long-Term Compensation Plan and Stock-Based Compensation Expense | The following table summarizes compensation expense recorded under the two plans.
|  | 2016 |  |  | 2015 |  |  | 2014 |
Restricted stock |  | $ | 2,766 |  |  | $ | 3,835 |  |  | $ | 2,399 |
Long-term compensation plan |  |  | 2,105 |  |  |  | 1,815 |  |  |  | 851 |
Total expense |  | $ | 4,871 |  |  | $ | 5,650 |  |  | $ | 3,250 |
Time-Based Restricted Stock Activity | The following table summarizes the time-based restricted stock activity for the year ended December 31, 2016:
|  | Shares |  |  | Weighted average remaining term (years) |  |  | Aggregate intrinsic value |
Outstanding at January 1, 2016 |  |  | 414 |  |  |  | 2.56 |  |  | $ | 6,926 |
Shares vested |  |  | (121 | ) |  |  |  |  |  |  | 1,902 |
Shares awarded |  |  | 30 |  |  |  |  |  |  |  | 505 |
Shares forfeited |  |  | (47 | ) |  |  |  |  |  |  | 800 |
Outstanding at December 31, 2016 |  |  | 276 |  |  |  | 1.97 |  |  |  | 3,767 |
Performance Share Activity | The following table summarizes activity related to unvested performance restricted stock shares during 2016:
|  | Total Unvested Shares |  |  | Weighted average remaining term (years) |  |  | Aggregate intrinsic value |
Outstanding at January 1, 2016 |  |  | 366 |  |  |  | 1.64 |  |  | $ | 6,123 |
Shares vested |  |  | (128 | ) |  |  |  |  |  |  | 1,978 |
Shares awarded |  |  | 85 |  |  |  |  |  |  |  | 1,423 |
Shares forfeited |  |  | (153 | ) |  |  |  |  |  |  | 2,184 |
Outstanding at December 31, 2016 |  |  | 170 |  |  |  | 1.71 |  |  |  | 2,321 |

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 number and weighted-average grant date fair value for unvested performance 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=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationPerformanceSharesAwardUnvestedActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of compensation cost for share-based payment arrangements allocation of share-based compensation costs. + References No definition available. + Details
Name: | vdsi_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsTableTextBlock
Namespace Prefix: | vdsi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of time based restricted stock activity. + References No definition available. + Details
Name: | vdsi_ScheduleOfTimeBasedRestrictedStockActivityTableTextBlock
Namespace Prefix: | vdsi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration