CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 39,245,237	$ 44,077,751
Accounts receivable, net	20,499,578	16,092,836
Inventory, net	4,229,291	3,880,776
Prepaid expenses and other current assets	2,325,535	1,337,408
Total current assets	66,299,641	65,388,771
Property and equipment, net of accumulated depreciation	4,680,476	4,086,106
Goodwill	4,040,443	4,040,443
Intangible assets, net of accumulated amortization	11,004,073	11,178,573
Total assets	86,024,633	84,693,893
Current liabilities:
Accounts payable	2,445,627	2,490,531
Accrued compensation	6,154,401	5,588,811
Accrued expenses	1,137,508	1,405,974
Other current liabilities	175,247	122,551
Total current liabilities	9,912,783	9,607,867
Other liabilities	1,623,171	1,517,956
Total liabilities	11,535,954	11,125,823
Commitments and contingencies (Note 12)	0	0
Stockholders' equity:
Preferred stock; $.001 par value; 5,000,000 shares authorized and 0 shares issued and outstanding	0	0
Common stock; $.001 par value; 130,000,000 shares authorized; 106,164,603 issued and 105,330,403 outstanding as of June 30, 2014 and 104,425,614 issued and 104,375,614 outstanding as of December 31,2013	106,165	104,426
Additional paid-in capital	154,078,653	147,284,219
Treasury stock (834,200 shares as of June 30, 2014 and 50,000 shares as of December 31,2013 at cost)	(4,588,333)	(25,000)
Accumulated deficit	(75,107,806)	(73,795,575)
Total stockholders' equity	74,488,679	73,568,070
Total liabilities and stockholders' equity	$ 86,024,633	$ 84,693,893