Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 118,843,674	$ 192,148,312
Short-term investments, net	79,998,132	21,330,110
Accounts receivable, net	15,248,062	19,052,672
Inventories, net	22,522,356	15,076,590
Prepaid expenses and other current assets	4,659,251	2,406,505
Total current assets	241,271,475	250,014,189
Property, plant and equipment, net	11,130,352	7,484,022
Long-term investments, net	0	4,005,659
Other intangible assets, net	1,785,509	1,595,456
Deferred financing costs, net	2,800,497	2,939,149
Restricted cash	1,538,429	1,538,429
Total assets	258,526,262	267,576,904
Current liabilities:
Accounts payable	3,336,590	3,889,643
Accrued expenses and other current liabilities	8,331,089	7,001,350
Total current liabilities	11,667,679	10,890,993
Convertible senior notes, net	91,518,710	88,921,557
Commitments and contingencies - See Note 16
Stockholders' equity:
Preferred stock - $.001 par value; 5,000,000 shares authorized; no shares issued and outstanding at June 30, 2011 and December 31, 2010	0	0
Common stock - $.001 par value; 25,000,000 shares authorized; 13,925,984 and 13,878,686 shares issued and outstanding at June 30, 2011 and December 31, 2010, respectively	13,926	13,879
Additional paid-in capital	309,569,724	302,533,344
Accumulated deficit	(146,795,591)	(127,268,545)
Accumulated other comprehensive loss:
Cumulative translation adjustments	(7,457,261)	(7,548,706)
Unrealized gain on investments	9,075	34,382
Total accumulated other comprehensive loss	(7,448,186)	(7,514,324)
Total stockholders' equity	155,339,873	167,764,354
Total liabilities and stockholders' equity	$ 258,526,262	$ 267,576,904