Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income from continuing operations	$ 1,994	$ 3,647
Adjustments to reconcile net income from continuing operations to net cash provided by continuing operations:
Depreciation and amortization	939	933
Deferred tax expense (benefit)	758	(459)
Non-cash compensation	1,078	567
Changes in assets and liabilities:
Accounts receivable, net	9,323	3,275
Inventories	(3,534)	(937)
Foreign sales tax receivable	400	897
Other current assets	(1,146)	(145)
Accounts payable	576	(496)
Income taxes payable	(1,995)	612
Accrued expenses	510	869
Current deferred compensation	(303)	0
Deferred revenue	(602)	2,758
Net cash provided by operating activities of continuing operations	7,998	11,521
Cash flows from investing activities of continuing operations:
Additions to property and equipment	(245)	(294)
Additions to intangible assets	(60)	(7,554)
Other assets	14	(202)
Net cash used in investing activities of continuing operations	(291)	(8,050)
Cash flows from financing activities of continuing operations:
Proceeds from exercise of stock options and warrants	97	14
Net cash provided by financing activities of continuing operations	97	14
Cash flows used in discontinued operations:
Net cash provided by (used in) operating activities of discontinued operations	(336)	162
Net cash provided by (used in) investing activities of discontinued operations	0	(5,690)
Net cash provided by (used in) discontinued operations	(336)	(5,528)
Effect of exchange rate changes on cash	1,412	2,532
Net increase in cash	8,880	489
Cash and equivalents, beginning of year	84,497	85,533
Cash and equivalents, end of period	$ 93,377	$ 86,022

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. 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 minimal 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. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).