CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ 2,796,435	$ (2,086,284)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	1,696,885	806,658
Stock-based compensation expense	455,669	537,048
Gain on bargain purchase	(314,244)
Loss on revaluation of contingent consideration	62,132
Loss on disposal of assets		5,597
Changes in assets and liabilities:
Accounts receivable	(5,141,897)	(1,350,638)
Royalties receivable	(372,715)	(25,857)
Inventories	1,658,864	(755,219)
Prepaid expenses and other current assets	238,285	1,527,019
Accounts payable	1,207,265	223,344
Accrued liabilities	1,239,381	(107,709)
Long-term liabilities	212,763	(40,473)
Net cash provided by (used in) operating activities	3,738,823	(1,266,514)
Cash flows from investing activities:
Purchases of marketable securities	(22,977,047)	(50,502,952)
Redemptions of marketable securities	24,483,333	49,835,417
Purchases of property, plant and equipment	(513,515)	(374,686)
Net cash provided by (used in) investing activities	992,771	(1,042,221)
Cash flows from financing activities:
Exercise of stock options	134,986	69,214
Repurchase of common stock		(88,401)
Net cash provided by (used in) financing activities	134,986	(19,187)
Effect of exchange rate changes on cash and cash equivalents	(154,319)
Net increase (decrease) in cash and cash equivalents	4,712,261	(2,327,922)
Cash and cash equivalents, beginning of period	11,167,745	9,794,509
Cash and cash equivalents, end of period	$ 15,880,006	$ 7,466,587