CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 8,148,599	$ 9,041,478
Accounts receivable, net of allowance for doubtful accounts of $991,990 and $2,404,659 at December 31, 2012 and 2013, respectively	6,225,923	5,373,023
Prepaid expenses and other current assets	981,908	576,112
Total current assets	15,356,430	14,990,613
Property and equipment, net	1,934,582	1,023,198
Intangible assets, net	767,223	575,409
Total assets	18,058,235	16,589,220
Current liabilities:
Accounts payable	1,694,312	1,191,122
Accrued expenses	666,675	343,913
Accrued royalties	1,293,717	712,776
Accrued payroll and related liabilities	1,850,923	1,382,265
Capital lease obligation, current portion	157,238	158,669
Deferred revenue	0	483,052
Line of credit	0	1,000,000
Total current liabilities	5,662,865	5,271,797
Capital lease obligation, net of current portion	136,419	83,910
Line of credit	1,000,000	0
Total liabilities	6,799,284	5,355,707
Commitments and contingencies (Note 5)
Common stock classified outside of stockholders’ equity (deficit) (Note 10)	5,500,000	11,775,724
Stockholders’ equity (deficit):
Common stock, $0.01 par value; 50,000,000 shares authorized; 32,797,625 and 38,712,896 shares issued and outstanding at December 31, 2012 and 2013, respectively	337,185	232,414
Additional paid-in capital	70,986,406	56,766,036
Accumulated deficit	(65,297,179)	(57,276,664)
Accumulated other comprehensive loss	(267,461)	(263,997)
Total stockholders’ equity (deficit)	5,758,951	(542,211)
Total liabilities, common stock classified outside of stockholders’ equity (deficit) and stockholders’ equity (deficit)	$ 18,058,235	$ 16,589,220