Discontinued Operations (Major Classes of Assets and Liabilities Related to Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Liabilities of Disposal Group, Including Discontinued Operation [Abstract]
Restructuring accrual	$ 365	$ 1,328
AssuredUVS [Member]
Assets of Disposal Group, Including Discontinued Operation [Abstract]
Cash and cash equivalents	0	0
Inventories	0	56
Prepaid expenses and other assets	5	110
Total current assets	5	166
Property and equipment, net	0	1,031
Intangible assets, net	0	1,824
Other assets	55	54
Total assets	60	3,075
Liabilities of Disposal Group, Including Discontinued Operation [Abstract]
Accounts payable	7	203
Accrued compensation	0	372
Accrued expenses	20	232
Deferred revenue	0	319
Restructuring accrual	206	0
Liabilities of Disposal Group, Including Discontinued Operation, Current	$ 233	$ 1,126

Disposal Group, Including Discontinued Operation, Accounts Payable, Current

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Disposal Group, Including Discontinued Operation, Accrued Compensation, Current

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Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current

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Disposal Group, Including Discontinued Operation, Deferred Revenue, Current

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Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current

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- Definition

The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for assets of a disposal group, including a component of the entity (discontinued operation), to be sold or that has been disposed of through sale, as of the financial statement date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

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-Name Statement of Financial Accounting Standard (FAS)

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The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for current assets (assets with expected useful life shorter than one year or one operating cycle, whichever is longer) of a disposal group, including a component of the entity (discontinued operation), to be sold or that has subsequently been disposed of through sale, as of the financial statement date.

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For the disposal group, including a component of the entity (discontinued operation), cash includes currency on hand as well as demand deposits with banks or financial institutions. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 47

-Subparagraph a

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-Paragraph 7, 8, 9

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-Glossary Cash

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-Name Accounting Standards Codification

-Glossary Cash Equivalents

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-Name Accounting Standards Codification

-Topic 205

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-Section 50

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- Definition

For the disposal group, including a component of the entity (discontinued operation), carrying value (net of any accumulated amortization and write-downs) of nonphysical assets (such as copyrights, customer lists, patents, trade names, core deposits, trade secrets, and contractual rights), not elsewhere itemized.

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-Topic 205

-SubTopic 20

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-Paragraph 1

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For the disposal group, including a component of the entity (discontinued operation), carrying amount of inventories (net of all valuation allowances and write-downs).

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- Definition

For the disposal group, including a component of the entity (discontinued operation), carrying amount as of the balance sheet date of assets not otherwise specified, and which are expected to be realized or consumed after one year or beyond the normal operating cycle, if longer. For an unclassified balance sheet, represents both current and noncurrent other assets.

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For the disposal group, including a component of the entity (discontinued operation), carrying value (net of accumulated depreciation and any write-downs) of tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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Carrying value as of the balance sheet date of current obligations (due less than one year or one operating cycle, if longer) arising from the sale, disposal or planned sale in the near future (generally within one year) of a disposal group, including a component of the entity (discontinued operation).

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 4

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-Name Emerging Issues Task Force (EITF)

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