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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 15,880,006 $ 11,167,745
Marketable securities 12,501,794 15,421,436
Accounts receivable, less reserve for doubtful accounts of $10,000 at June 30, 2012 and December 31, 2011 7,811,792 2,825,414
Royalties receivable 3,579,555 3,206,840
Inventories, net 11,503,071 13,363,073
Prepaid expenses and other current assets 1,082,984 910,298
Total current assets 52,359,202 46,894,806
Property, plant and equipment, at cost:    
Leasehold improvements 5,078,898 5,083,852
Equipment 11,973,175 12,011,154
Furniture and fixtures 1,669,990 1,244,451
Construction in progress 188,993 275,258
Total property, plant and equipment, at cost 18,911,056 18,614,715
Less: Accumulated depreciation (9,043,027) (7,877,296)
Property, plant and equipment, net 9,868,029 10,737,419
Long-term marketable securities 10,850,675 9,435,350
Intangible assets, net 7,176,789 7,795,239
Goodwill 994,000 994,000
Restricted cash 200,000 200,000
Total assets 81,448,695 76,056,814
Current liabilities:    
Accounts payable 2,584,636 1,422,483
Accrued liabilities 7,148,341 6,041,038
Total current liabilities 9,732,977 7,463,521
Other long-term liabilities 2,742,953 2,469,412
Deferred tax liability 242,520 136,881
Commitments and contingencies      
Stockholders' equity:    
Preferred stock, $.01 par value, 5,000,000 shares authorized, no shares issued or outstanding      
Common stock, $.01 par value, 40,000,000 shares authorized, 30,846,165 shares at June 30, 2012 and 30,714,757 shares at December 31, 2011 issued and outstanding 308,462 307,148
Additional paid-in capital 185,462,180 184,872,839
Accumulated other comprehensive income (loss) (527,677) 113,627
Accumulated deficit (116,512,720) (119,306,614)
Total stockholders' equity 68,730,245 65,987,000
Total liabilities and stockholders' equity $ 81,448,695 $ 76,056,814