Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
Current Assets
Cash and cash equivalents	$ 16,497,725	$ 19,396,845
Short-term investments	50,000,000	55,996,000
Accounts receivable, net of allowances of $595,827 and $531,205, respectively	8,209,842	8,758,034
Inventories	15,841,189	13,280,940
Prepaid expenses and other current assets	3,105,842	3,411,934
Total current assets	93,654,598	100,843,753
Long-term investments	8,437,096	8,422,790
Equipment and improvements, net of accumulated depreciation and amortization of $7,481,760 and $7,681,863, respectively	3,590,405	3,614,439
Identifiable intangible assets, net of accumulated amortization of $11,377,437 and $10,631,372, respectively	12,069,439	12,815,504
Goodwill	13,457,693	13,457,693
Other assets	140,243	143,733
Total assets	131,349,474	139,297,912
Current Liabilities
Accounts payable	6,214,252	5,058,892
Accrued expenses and other current liabilities	4,769,770	6,452,358
Total current liabilities	10,984,022	11,511,250
Long-term liabilities	488,983	521,358
Deferred tax liability	1,693,853	1,700,640
Total Liabilities	13,166,858	13,733,248
Contingencies (note 10)
Stockholders' Equity
Convertible preferred stock, $.01 par value; shares authorized 1,468,750; issued and outstanding 73,332 at March 31, 2015 and December 31, 2014 (liquidation preference of $3,222,368 at March 31, 2015)	733	733
Common stock, $.01 par value; shares authorized 50,000,000; issued and outstanding 25,710,990 at March 31, 2015 and 25,319,203 at December 31, 2014	257,110	253,192
Additional paid-in capital	231,712,159	228,341,542
Accumulated other comprehensive income	764,557	911,563
Accumulated deficit	(114,551,943)	(103,942,366)
Total stockholders' equity	118,182,616	125,564,664
Total liabilities and stockholders' equity	$ 131,349,474	$ 139,297,912