CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
OPERATING ACTIVITIES
Net income	$ 10,461	$ 6,873
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	690	536
Gain on sale of equipment and property	(12)	(17)
Stock-based compensation expense	1,481	1,372
Excess tax benefits for share-based payments	(221)	(311)
Deferred income tax provision (benefit)	453	(462)
(Increase) decrease in assets:
Accounts receivable	(1,592)	(1,494)
Inventories	(3,487)	4,286
Prepaid expenses and other current assets	(120)	195
Income taxes receivable	(590)	360
Other non-current assets	95	(339)
Increase (decrease) in liabilities:
Accounts payable	5,506	369
Income taxes payable	374	426
Accrued expenses and other liabilities	202	1,261
Other long-term liabilities	(522)	93
Net cash provided by operating activities	12,718	13,148
INVESTING ACTIVITIES
Capital expenditures	(3,604)	(345)
Proceeds from sale of assets	7	39
Purchases of marketable securities	(9,896)	(15,324)
Sales of marketable securities	11,389	4,719
Maturities of marketable securities	900	2,690
Net cash used for investing activities	(1,204)	(8,221)
FINANCING ACTIVITIES
Payment of dividends	(4,588)	(3,435)
Excess tax benefits for share-based payments	221	311
Cash paid for common stock purchased and retired	(2,108)	(1,621)
Net cash used for financing activities	(6,475)	(4,745)
Net increase in cash and cash equivalents	5,039	182
Cash and cash equivalents at beginning of period	4,072	5,114
Cash and cash equivalents at end of period	9,111	5,296
Supplemental information:
Income tax payments, net	$ 4,757	$ 2,632