8. Accrued Expenses (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Summary of accrued expenses
Accrued payroll	$ 585,955	$ 549,287
Accrued vacation	332,932	152,142
Deferred revenue	434,406	97,597
Other accrued liabilities	401,561	436,233
Accrued expenses	$ 1,754,854	$ 1,235,259