5. Property and Equipment (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Property and equipment, gross	$ 3,227,387	$ 3,439,685
Accumulated depreciation	(2,377,404)	(2,880,147)
Property and equipment, net	849,893	559,538
Computers, Software and Office Equipment [Member]
Property and equipment, gross	1,792,499	1,789,070
Accumulated depreciation	(1,319,388)	(1,430,016)
Property and equipment, net	473,111	359,054
Construction in Progress [Member]
Property and equipment, gross	219,938	0
Accumulated depreciation	0	0
Property and equipment, net	219,938	0
Machinery and Equipment [Member]
Property and equipment, gross	95,356	561,431
Accumulated depreciation	(88,342)	(536,045)
Property and equipment, net	7,014	25,386
Vehicles [Member]
Property and equipment, gross	159,431	143,395
Accumulated depreciation	(110,098)	(83,130)
Property and equipment, net	49,333	60,265
Furniture and Fixtures [Member]
Property and equipment, gross	305,854	297,346
Accumulated depreciation	(273,768)	(263,290)
Property and equipment, net	32,086	34,056
Leasehold Improvements [Member]
Property and equipment, gross	654,309	648,443
Accumulated depreciation	(585,808)	(567,666)
Property and equipment, net	$ 68,501	$ 80,777