CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 9,041,478	$ 1,700,295
Accounts receivable, net of allowance for doubtful accounts of $838,750 and $991,990 at December 31, 2011 and 2012, respectively	5,373,023	4,047,059
Prepaid expenses and other current assets	576,112	991,351
Total current assets	14,990,613	6,738,705
Property and equipment, net	1,023,198	1,045,287
Intangible assets	575,409	66,815
Total assets	16,589,220	7,850,807
Current liabilities:
Accounts payable	1,191,122	1,492,526
Accrued expenses	343,913	1,149,741
Accrued royalties	712,776	738,832
Accrued payroll and related liabilities	1,382,265	1,362,689
Capital lease obligation, current portion	158,669	149,253
Deferred revenue	483,052
Line of credit	1,000,000	1,000,000
Total current liabilities	5,271,797	5,893,041
Capital lease obligation, net of current portion	83,910	240,928
Total liabilities	5,355,707	6,133,969
Commitments and contingencies (Note 5)
Common stock classified outside of stockholders' equity (deficit) (Note 11)	11,775,724	7,854,682
Stockholders' equity (deficit)
Common stock, $0.01 par value; 50,000,000 shares authorized; 19,540,358 and 32,797,625 shares issued and outstanding at December 31, 2011 and 2012, respectively	232,414	134,327
Additional paid-in capital	56,766,036	43,514,591
Accumulated deficit	(57,276,664)	(49,519,585)
Accumulated other comprehensive loss	(263,997)	(267,177)
Total stockholders' equity (deficit)	(542,211)	(6,137,844)
Total liabilities, common stock classified outside of stockholders' equity (deficit) and stockholders' equity (deficit)	$ 16,589,220	$ 7,850,807