Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 731	$ 478
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization expense	323	329
Amortization of deferred rent	(15)	(17)
Stock-based compensation expense	59	51
Provision for (recoveries of) doubtful accounts, net	27	(59)
Inventory valuation reserve adjustments	(34)	90
Changes in operating assets and liabilities:
Receivables	434	1,416
Inventories	(555)	(2,224)
Deferred income taxes	0	(10)
Prepaid expenses and other assets	(138)	(157)
Accounts payable	1,410	(984)
Accrued liabilities	(144)	309
Income taxes payable	(15,066)	(1,064)
Deferred product revenue	599	418
Other long-term liabilities	0	15
Net cash provided by operating activities	(12,369)	(1,409)
Cash flows from investing activities:
Payment towards business acquisitions	0	(4,632)
Purchase of property and equipment	(62)	(65)
Net cash used in investing activities	(62)	(4,697)
Cash flows from financing activities:
Proceeds from the exercise of stock options	76	0
Treasury stock purchased	(574)	0
Net cash provided by (used in) financing activities	(498)	0
Net increase in cash and cash equivalents	(12,929)	(6,106)
Cash and cash equivalents at the beginning of the period	55,509	16,683
Cash and cash equivalents at the end of the period	42,580	10,577
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 15,346	$ 1,378