Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net income from continuing operations	$ 16,229	$ 24,251	$ 10,806
Adjustments to reconcile net income from continuing operations to net cash provided by continuing operations:
Depreciation and amortization	3,644	3,809	2,458
Deferred tax expense (benefit)	1,065	(4,332)	118
Stock-based compensation	3,726	6,117	1,021
Changes in assets and liabilities:
Accounts receivable, net	4,530	(10,315)	6,700
Inventories	(2,641)	(5,323)	(1,695)
Foreign sales tax receivable	264	1,600	(1,155)
Other current assets	77	186	(229)
Accounts payable	407	(1,569)	4,465
Income taxes payable	(1,589)	(113)	(744)
Accrued expenses	(207)	1,438	41
Deferred compensation	(1,933)	0	0
Deferred revenue	(537)	2,169	(703)
Net cash provided by operating activities of continuing operations	23,035	17,918	21,083
Cash flows from investing activities of continuing operations:
Purchase of Alfa & Ariss	0	(1,301)	0
Additions to property and equipment	(1,337)	(1,132)	(1,417)
Additions to intangible assets	(326)	(7,287)	(289)
Other assets	117	(64)	(66)
Net cash used in investing activities of continuing operations	(1,546)	(9,784)	(1,772)
Cash flows from financing activities of continuing operations:
Proceeds from exercise of stock options, net	441	153	3
Net cash provided by financing activities of continuing operations	441	153	3
Cash flows used in discontinued operations:
Net cash used in operating activities of discontinued operations	(974)	(1,310)	0
Net cash used in investing activities of discontinued operations	0	(5,761)	0
Net cash used in discontinued operations	(974)	(7,071)	0
Effect of exchange rate changes on cash	1,015	(2,252)	(1,382)
Net increase (decrease) in cash	21,972	(1,036)	17,932
Cash and equivalents, beginning of year	84,497	85,533	67,601
Cash and equivalents, end of year	106,469	84,497	85,533
Supplemental cash flow disclosures:
Cash paid for income taxes	6,005	5,914	3,372
Cash paid for interest	$ 0	$ 0	$ 0