Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income during the period	$ 1,424	$ 1,775
Adjustments to reconcile net income to net cash provided by (used in) operations:
Depreciation and amortization expense	783	644
Amortization of deferred rent	(46)	(167)
Stock-based compensation expense	168	126
Provision for doubtful accounts, net	11	27
Inventory valuation reserve adjustments	424	(34)
Loss on disposal of assets	2	0
Tax benefit from the exercise of stock options	(90)	(38)
Changes in operating assets and liabilities:
Receivables	(555)	(78)
Inventories	(749)	(1,051)
Deferred income taxes	(333)	0
Prepaid expenses and other assets	739	(414)
Accounts payable	(570)	729
Accrued liabilities	441	(24)
Income taxes payable	(2)	(14,782)
Deferred product revenue	1,086	707
Other long-term liabilities	(87)	0
Net cash provided by (used in) operating activities	2,820	(12,580)
Cash flows from investing activities:
Payment towards business acquisitions	13,078	0
Purchase of property and equipment	(371)	(457)
Purchase of patents	(90)	0
Purchase of marketable securities	(311)	(9,297)
Net cash used in investing activities	(13,850)	(9,754)
Cash flows from financing activities:
Proceeds from the exercise of stock options	1,265	164
Tax benefit from stock options	90	38
Stock registration costs	(55)	0
Treasury stock purchased	(1,169)	(991)
Net cash provided by (used in) financing activities	131	(789)
Net decrease in cash and cash equivalents	(10,899)	(23,123)
Cash and cash equivalents at the beginning of the period	17,192	55,509
Cash and cash equivalents at the end of the period	6,293	32,386
Supplemental disclosure of cash flow information:
Cash paid for income taxes	657	16,757
Issuance of common stock in connection with acquisition of business	$ 1,679	$ 0