Stock-Based Compensation (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Summary of stock-based compensation expense [Abstract]
Total stock-based compensation expense	$ 185,800	$ 189,400
Number of Shares [Roll Forward]
Outstanding - Beginning of Period (in shares)	14,174,000
Granted (in shares)	0
Exercised (in shares)	(431,500)
Forfeited or expired (in shares)	0
Outstanding - End of Period (in shares)	13,742,500
Weighted Average Exercise Price [Roll Forward]
Outstanding - Beginning of Period (in dollars per share)	$ 0.20
Granted (in dollars per share)	$ 0
Exercised (in dollars per share)	$ 0.14
Forfeited or expired (in dollars per share)	$ 0
Outstanding - End of Period (in dollars per share)	$ 0.20
Weighted average remaining contractual terms (in years)	7 years 1 month 20 days
Aggregate intrinsic value	5,897,500
Shares fully vested (in shares)	7,627,407
Shares expected to vest in future (in shares)	5,895,614
Shares expected to be forfeited (in shares)	219,479
Stock option vesting term	33 months
Number of Shares [Abstract]
Outstanding - Beginning of Period (in shares)	4,043,123
Awarded (in shares)	385,000
Released (in shares)	(362,031)
Forfeited (in shares)	0
Outstanding - End of Period (in shares)	4,066,092
Weighted Average Grant Date Fair Value [Abstract]
Outstanding - Beginning of Period (in dollars per share)	$ 0.18
Awarded (in dollars per share)	$ 0.45
Released (in dollars per share)	$ 0.18
Forfeited (in dollars per share)	$ 0
Outstanding - End of Period (in dollars per share)	$ 0.21
Weighted Average Remaining Recognition Period	2 years 4 months 20 days
Unrecognized Compensation Cost Remaining	779,700
Stock Options [Member]
Weighted Average Grant Date Fair Value [Abstract]
Unrecognized compensation cost	457,100
Weighted-average period, compensation cost not yet recognized	11 months
Restricted Stock [Member]
Weighted Average Grant Date Fair Value [Abstract]
Unrecognized compensation cost	730,200
Weighted-average period, compensation cost not yet recognized	29 months
Costs of Revenue [Member]
Summary of stock-based compensation expense [Abstract]
Total stock-based compensation expense	2,100	6,300
Selling and Marketing Expense [Member]
Summary of stock-based compensation expense [Abstract]
Total stock-based compensation expense	40,500	26,400
General and Administrative Expense [Member]
Summary of stock-based compensation expense [Abstract]
Total stock-based compensation expense	94,900	73,100
Research and Development Expense [Member]
Summary of stock-based compensation expense [Abstract]
Total stock-based compensation expense	$ 48,300	$ 83,600