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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
Sep. 30, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 42,244,420 $ 29,209,821
Marketable securities 20,746,490 10,845,195
Accounts receivable, less reserve for doubtful accounts of $10,000 6,323,537 4,158,758
Royalties and other receivables 6,595,017 9,130,515
Inventories, net 10,063,695 11,143,695
Deferred tax asset, net 416,580 416,580
Prepaid expenses and other current assets 1,051,379 1,304,887
Total current assets 87,441,118 66,209,451
Property, plant and equipment, at cost:    
Leasehold improvements 5,258,050 5,200,271
Equipment 13,485,039 12,802,978
Furniture and fixtures 2,035,224 1,937,238
Construction in progress 3,383,870 338,814
Total property, plant and equipment, at cost 24,162,183 20,279,301
Less: Accumulated depreciation (11,871,114) (10,326,840)
Property, plant and equipment, net 12,291,069 9,952,461
Long-term deferred tax asset, net 114,788 2,557,384
Long-term marketable securities 4,114,450 9,914,855
Intangible assets, net 6,481,532 7,182,012
Goodwill 994,000 994,000
Restricted cash 200,000 200,000
Total assets 111,636,957 97,010,163
Current liabilities:    
Accounts payable 929,586 2,454,238
Accrued liabilities 7,854,729 8,297,990
Total current liabilities 8,784,315 10,752,228
Other long-term liabilities 2,695,521 2,133,339
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, 31,883,041 shares at September 30, 2013 and 31,195,041 shares at December 31, 2012 issued and outstanding 318,830 311,950
Additional paid-in capital 190,048,182 187,051,253
Accumulated other comprehensive income 2,174,989 1,911,970
Accumulated deficit (92,384,880) (105,150,577)
Total stockholders' equity 100,157,121 84,124,596
Total liabilities and stockholders' equity $ 111,636,957 $ 97,010,163