CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ 4,602,924	$ (1,481,611)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	2,592,824	1,212,489
Stock-based compensation expense	743,947	781,645
Fair value adjustments to contingent consideration	339,433
Gain on bargain purchase	(314,244)
Loss on disposal of assets		5,597
Changes in assets and liabilities:
Accounts receivable	(4,672,351)	(2,849,296)
Royalties receivable	(755,864)	(42,858)
Inventories	3,036,051	(522,515)
Prepaid expenses and other current assets	247,093	1,262,077
Accounts payable	309,710	(118,734)
Accrued liabilities	1,087,295	671,455
Long-term liabilities	(1,006,654)	(36,674)
Net cash provided by (used in) operating activities	6,210,164	(1,118,425)
Cash flows from investing activities:
Purchases of marketable securities	(36,337,643)	(65,381,613)
Redemptions of marketable securities	36,863,333	68,100,987
Purchases of property, plant and equipment	(825,061)	(545,318)
Net cash (used in) provided by investing activities	(299,371)	2,174,056
Cash flows from financing activities:
Exercise of stock options	886,704	69,239
Repurchase of common stock		(419,267)
Net cash provided by (used in) financing activities	886,704	(350,028)
Effect of exchange rate changes on cash and cash equivalents	424,735
Net increase in cash and cash equivalents	7,222,232	705,603
Cash and cash equivalents, beginning of period	11,167,745	9,794,509
Cash and cash equivalents, end of period	$ 18,389,977	$ 10,500,112