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CONSOLIDATED BALANCE SHEETS (USD $)
Dec. 31, 2011
Mar. 31, 2011
Current assets:    
Cash and cash equivalents $ 11,167,745 $ 14,203,544
Marketable securities 15,421,436 35,421,520
Accounts receivable, less reserve for doubtful accounts of $10,000 2,825,414 1,259,607
Royalties receivable 3,206,840 2,512,602
Inventories, net 13,363,073 1,953,976
Prepaid expenses and other current assets 910,298 492,767
Total current assets 46,894,806 55,844,016
Property, plant and equipment, at cost:    
Leasehold improvements 5,864,797 3,879,130
Equipment 11,402,256 4,426,628
Furniture and fixtures 1,137,802 644,541
Construction in progress 209,860  
Total property, plant and equipment, at cost 18,614,715 8,950,299
Less: Accumulated depreciation (7,877,296) (6,793,984)
Property, plant and equipment, net 10,737,419 2,156,315
Long-term marketable securities 9,435,350 11,878,201
Intangible assets, net 7,795,239 1,221,458
Goodwill 994,000 994,000
Restricted cash 200,000 200,000
Total assets 76,056,814 72,293,990
Current liabilities:    
Accounts payable 1,422,483 930,601
Accrued liabilities 6,041,038 3,692,523
Total current liabilities 7,463,521 4,623,124
Other long-term liabilities 2,469,412 584,162
Long-term deferred tax liability 136,881  
Commitments and contingencies (Note 5)      
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, 30,714,757 shares at December 31, 2011 and 30,812,257 shares at March 31, 2011 issued and outstanding 307,148 308,123
Additional paid-in capital 184,872,839 184,743,195
Accumulated other comprehensive income 113,627  
Accumulated deficit (119,306,614) (117,964,614)
Total stockholders' equity 65,987,000 67,086,704
Total liabilities and stockholders' equity $ 76,056,814 $ 72,293,990