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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 40,012,048 $ 35,363,024
Marketable securities 23,154,820 23,090,209
Accounts receivable, less reserve for doubtful accounts of $73,550 and $40,644, respectively 14,419,602 7,760,382
Other receivables 523,369 239,890
Inventories 14,305,676 12,383,633
Deferred tax asset, net 4,928 4,928
Prepaid expenses and other current assets 846,808 2,103,576
Total current assets 93,267,251 80,945,642
Property, plant and equipment, at cost:    
Leasehold improvements 13,249,754 9,108,214
Equipment 13,526,113 13,115,630
Furniture and fixtures 2,651,661 2,270,347
Construction in progress 76,519 3,847,746
Total property, plant and equipment, at cost 29,504,047 28,341,937
Less: Accumulated depreciation (15,040,331) (13,815,697)
Property, plant and equipment, net 14,463,716 14,526,240
Long-term marketable securities 1,223,468 3,550,210
Intangible assets, net 13,594,163 14,636,307
Goodwill 14,346,057 14,184,835
Restricted cash 450,000 450,000
Total assets 137,344,655 128,293,234
Current liabilities:    
Accounts payable 4,303,354 3,863,350
Accrued liabilities 11,522,317 6,819,063
Total current liabilities 15,825,671 10,682,413
Other long-term liabilities $ 3,296,446 $ 5,879,013
Commitments and contingencies (Note 11)    
Stockholders' equity:    
Preferred stock, $.01 par value, 5,000,000 shares authorized, no shares issued or outstanding    
Common stock, $.01 par value, 80,000,000 shares authorized, 32,902,987 shares at June 30, 2015 and 32,774,374 shares at December 31, 2014 issued and outstanding $ 329,030 $ 327,744
Additional paid-in capital 200,435,716 198,064,414
Accumulated other comprehensive income (loss) (8,197,044) (5,773,142)
Accumulated deficit (74,345,164) (80,887,208)
Total stockholders' equity 118,222,538 111,731,808
Total liabilities and stockholders' equity $ 137,344,655 $ 128,293,234