Consolidated Statements of Cash Flows (unaudited) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating activities
Net earnings	$ 4,292,000	$ 3,870,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	1,039,000	1,026,000
Amortization	673,000	409,000
Stock-based compensation	1,463,000	1,186,000
Deferred taxes, net	2,326,000	2,076,000
Change in fair value of contingent consideration	(96,000)	0
Change in allowance for doubtful accounts	10,000	45,000
Changes in operating assets and liabilities:
Accounts receivable	(1,613,000)	(413,000)
Inventories	239,000	(1,945,000)
Prepaid expenses	280,000	264,000
Accounts payable	216,000	440,000
Accrued compensation and expenses	(374,000)	(52,000)
Amortization of deferred license fees and other deferred revenue	(180,000)	(405,000)
Net cash provided by operating activities	8,275,000	6,501,000
Investing activities
Purchase of property and equipment	(1,782,000)	(1,146,000)
Cash paid for acquisition and license	(4,750,000)	(5,331,000)
Proceeds from the sale of property and equipment	8,000	0
Net cash used in investing activities	(6,524,000)	(6,477,000)
Financing activities
Repurchase of common shares	(5,402,000)	(2,548,000)
Proceeds from the exercise of stock options and sale of stock, net of expenses	889,000	721,000
Net cash used in financing activities	(4,513,000)	(1,827,000)
Decrease in cash and cash equivalents	(2,762,000)	(1,803,000)
Effect of exchange rate changes on cash and cash equivalents	(8,000)	(85,000)
Cash and cash equivalents at beginning of period	13,726,000	17,360,000
Cash and cash equivalents at end of period	10,956,000	15,472,000
Supplemental disclosure of cash flow
Cash paid for interest	6,000	6,000
Cash paid for taxes	$ 509,000	$ 263,000