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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Sep. 30, 2011
Dec. 31, 2010
Current assets:  
Cash and cash equivalents$ 99,124,304$ 192,148,312
Short-term investments, net90,291,86821,330,110
Accounts receivable, net11,336,94719,052,672
Inventories, net28,573,23515,076,590
Prepaid expenses and other current assets5,039,3222,406,505
Total current assets234,365,676250,014,189
Property, plant and equipment, net14,827,5257,484,022
Long-term investments, net04,005,659
Other intangible assets, net1,905,4541,595,456
Deferred financing costs, net2,727,6712,939,149
Restricted cash1,538,4291,538,429
Total assets255,364,755267,576,904
Current liabilities:  
Accounts payable4,568,1493,889,643
Accrued expenses and other current liabilities11,237,7167,001,350
Total current liabilities15,805,86510,890,993
Convertible senior notes, net92,876,96988,921,557
Other long-term liabilities1,947,0120
Commitments and contingencies - See Note 16  
Stockholders' equity:  
Preferred stock - $.001 par value; 5,000,000 shares authorized; no shares issued and outstanding at September 30, 2011 and December 31, 2010  
Common stock - $.001 par value; 25,000,000 shares authorized; 14,053,526 and 13,878,686 shares issued and outstanding at September 30, 2011 and December 31, 2010, respectively14,05413,879
Additional paid-in capital313,186,481302,533,344
Accumulated deficit(160,759,907)(127,268,545)
Accumulated other comprehensive loss:  
Cumulative translation adjustments(7,717,949)(7,548,706)
Unrealized gain on investments12,23034,382
Total accumulated other comprehensive loss(7,705,719)(7,514,324)
Total stockholders' equity144,734,909167,764,354
Total liabilities and stockholders' equity$ 255,364,755$ 267,576,904