XML 28 R24.htm IDEA: XBRL DOCUMENT v2.4.0.6

Long-Term Compensation Plan and Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Long-Term Compensation Plan and Stock Based Compensation [Abstract]

Details of long-term compensation plan and stock-based compensation expense

The following table details long-term compensation plan and stock-based compensation expense for the three and six months ended June 30, 2012 and 2011:

		Three months ended June 30,								Six months ended June 30,
		2012				2011				2012				2011
Restricted stock		$	845			$	375			$	1,694			$	746
Long-term compensation plan			325				374				554				570
Total Non-Cash Compensation		$	1,170			$	749			$	2,248			$	1,316

X

- Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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