Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income from continuing operations	$ 32,611	$ 10,967	$ 16,229
Adjustments to reconcile net income from continuing operations to net cash provided by continuing operations:
Depreciation and amortization	6,156	5,042	3,644
Loss on disposal of assets	0	275	0
Deferred tax expense (benefit)	492	(6,118)	1,065
Stock-based compensation	2,399	2,587	3,726
Changes in assets and liabilities:
Accounts receivable, net	(4,660)	(39)	4,530
Inventories	(8,222)	(6,492)	(2,641)
Foreign sales tax receivable	(112)	(135)	264
Other current assets	1,150	(2,865)	77
Accounts payable	4,531	(1,460)	407
Income taxes payable	(2,063)	3,641	(1,589)
Accrued expenses	3,344	565	(207)
Current deferred compensation	691	(2,424)	(1,933)
Deferred revenue	2,437	6,787	(537)
Net cash provided by operating activities of continuing operations	38,754	10,331	23,035
Cash flows from investing activities of continuing operations:
Purchase of short term investments	(94,856)	0	0
Maturities of short term investments	29,916	0	0
Purchase of Cronto	0	(19,495)	0
Additions to property and equipment	(1,453)	(944)	(1,337)
Additions to intangible assets	(112)	(294)	(326)
Other assets	(1,295)	267	117
Net cash used in investing activities of continuing operations	(67,800)	(20,466)	(1,546)
Cash flows from financing activities of continuing operations:
Proceeds from exercise of stock options, net	51	114	441
Tax payments for restricted stock issuances	(123)	(998)	0
Tax benefit of stock-based compensation	253	3,318	0
Net cash provided by financing activities of continuing operations	181	2,434	441
Cash flows from discontinued operations:
Net cash provided by (used in) operating activities of discontinued operations	2,864	(306)	(974)
Net cash provided by (used in) discontinued operations	2,864	(306)	(974)
Effect of exchange rate changes on cash	(165)	145	1,015
Net increase (decrease) in cash	(26,166)	(7,862)	21,972
Cash and equivalents, beginning of year	98,607	106,469	84,497
Cash and equivalents, end of year	72,441	98,607	106,469
Supplemental cash flow disclosures:
Cash paid for income taxes	6,109	3,121	6,005
Cash paid for interest	$ 0	$ 0	$ 0