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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Cash flows from operating activities:    
Net income from continuing operations $ 9,392 $ 6,986
Adjustments to reconcile net income from continuing operations to net cash provided by continuing operations:    
Depreciation and amortization 1,848 2,284
Deferred tax expense (benefit) 1,052 (1,385)
Non-cash compensation 2,248 1,316
Changes in assets and liabilities:    
Accounts receivable, net (3,003) 1,539
Inventories (1,056) (3,332)
Foreign sales tax receivable 244 1,711
Other current assets (1,011) (350)
Accounts payable (2,745) (2,206)
Income taxes payable (1,929) 830
Accrued expenses 409 3,090
Current deferred compensation (1,826) 0
Deferred revenue (915) 1,739
Net cash provided by operating activities of continuing operations 2,708 12,222
Cash flows from investing activities of continuing operations:    
Purchase of Alfa & Ariss 0 (1,301)
Additions to property and equipment (524) (627)
Additions to intangible assets (123) (7,554)
Other assets 184 (257)
Net cash used in investing activities of continuing operations (463) (9,739)
Cash flows from financing activities of continuing operations:    
Proceeds from exercise of stock options and warrants 97 17
Net cash provided by financing activities of continuing operations 97 17
Cash flows used in discontinued operations:    
Net cash provided by (used in) operating activities of discontinued operations (620) (303)
Net cash provided by (used in) investing activities of discontinued operations 0 (5,931)
Net cash provided by (used in) discontinued operations (620) (6,234)
Effect of exchange rate changes on cash (1,074) 2,832
Net increase in cash 648 (903)
Cash and equivalents, beginning of year 84,497 85,533
Cash and equivalents, end of period $ 85,145 $ 84,630