8. Accrued Expenses (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Accrued expenses	$ 1,367,962	$ 1,144,142
Accrued Operating Expenses [Member]
Accrued expenses	343,915	240,941
Accrued Wages and Related Expenses [Member]
Accrued expenses	600,160	490,961
Accrued Interest Expense [Member]
Accrued expenses	40,000	10,958
Accrued Sales Tax Payable [Member]
Accrued expenses	$ 383,887	$ 401,282