7. Leases (Details 4) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Finance Leases
2019	$ 35,365
2020	110,460
2021	39,117
Total minimum lease payments	184,942
Less amount representing interest	(10,809)
Present value of net minimum lease payments	$ 174,133	$ 266,747

Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount of lessee's undiscounted obligation for lease payments for finance lease.

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Amount of lessee's undiscounted obligation for lease payments for finance lease, due in next fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for finance lease, due in third fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for finance lease, due in second fiscal year following latest fiscal year.

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