Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 490	$ 731
Adjustments to reconcile net income to net cash provided by (used in) operations:
Depreciation and amortization expense	319	323
Amortization of deferred rent	(21)	(15)
Stock-based compensation expense	84	59
Provision for (recoveries of) doubtful accounts, net	(27)	27
Inventory valuation reserve adjustments	416	(34)
Loss on disposal of assets	2	0
Tax benefit from exercise of stock options	(87)	0
Changes in operating assets and liabilities:
Receivables	853	434
Inventories	40	(555)
Deferred income taxes	44	0
Prepaid expenses and other assets	886	(138)
Accounts payable	178	1,410
Accrued liabilities	210	(144)
Income taxes payable	235	(15,066)
Deferred product revenue	(51)	599
Net cash provided by (used in) operating activities	3,571	(12,369)
Cash flows from investing activities:
Payment towards business acquisitions	(13,048)	0
Purchase of property and equipment	(249)	(62)
Purchase of Patents	(90)	0
Purchases of marketable securities	(780)	0
Net cash (used in) investing activities	(14,167)	(62)
Cash flows from financing activities:
Proceeds from the exercise of stock options	1,021	76
Tax benefits from stock options	87	0
Payments of Stock Issuance Costs	(55)	0
Treasury stock purchased	0	(574)
Net cash provided by (used in) financing activities	1,053	(498)
Net (decrease) in cash and cash equivalents	(9,543)	(12,929)
Cash and cash equivalents at the beginning of the period	17,192	55,509
Cash and cash equivalents at the end of the period	7,649	42,580
Supplemental disclosure of cash flow information:
Cash paid for income taxes	29	15,346
Non-cash investing and financing activities:
Business Combination, Consideration Transferred	10,381
Common Stock [Member]
Non-cash investing and financing activities:
Business Combination, Consideration Transferred	$ 1,679	$ 0