Consolidated Statements of Cash Flows (unaudited) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities
Net earnings	$ 7,605,000	$ 6,858,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	2,109,000	1,578,000
Amortization	1,162,000	1,032,000
Stock-based compensation	2,567,000	2,221,000
Deferred taxes, net	2,275,000	3,634,000
Excess tax benefit from stock-based compensation	(1,331,000)	0
Change in fair value of contingent consideration	(79,000)	(96,000)
Gain on the sale of property and equipment	(22,000)	(1,000)
Change in accounts receivable allowance	15,000	5,000
Changes in operating assets and liabilities:
Accounts receivable	(691,000)	(2,168,000)
Inventories	(685,000)	1,062,000
Prepaid expenses and other	(176,000)	(282,000)
Accounts payable	127,000	621,000
Accrued expenses and compensation	659,000	(205,000)
Amortization of deferred license fees and other deferred revenue	101,000	(259,000)
Net cash provided by operating activities	13,636,000	14,000,000
Investing activities
Purchase of property and equipment	(3,486,000)	(2,370,000)
Cash paid for acquisitions and license	(500,000)	(7,000,000)
Proceeds from the sale of property and equipment	22,000	10,000
Net cash used in investing activities	(3,964,000)	(9,360,000)
Financing activities
Repurchase of common shares	(1,211,000)	(5,413,000)
Excess tax benefit from stock-based compensation	1,331,000	0
Proceeds from the exercise of stock options and sale of stock, net of expenses	2,759,000	954,000
Net cash provided by (used in) financing activities	2,879,000	(4,459,000)
Increase (decrease) in cash and cash equivalents	12,551,000	181,000
Effect of exchange rate changes on cash and cash equivalents	(3,000)	6,000
Cash and cash equivalents at beginning of period	11,554,000	13,726,000
Cash and cash equivalents at end of period	24,102,000	13,913,000
Supplemental disclosure of cash flow
Cash paid for interest	9,000	10,000
Cash paid for taxes	$ 1,499,000	$ 751,000