9. SEGMENT AND GEOGRAPHIC REPORTING (Details - geographic) - USD ($)	3 Months Ended		9 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
Revenues	$ 9,936,921	$ 8,553,068	$ 25,944,545	$ 22,978,565
Lancaster [Member]
Revenues	6,025,000	5,654,000	15,398,000	14,247,000
Buffalo [Member]
Revenues	2,538,000	1,942,000	6,895,000	5,722,000
North Carolina[Member]
Revenues	1,374,000	957,000	3,652,000	3,010,000
North America [Member]
Revenues	6,316,000	5,252,000	16,573,000	14,097,000
North America [Member] | Lancaster [Member]
Revenues	2,872,000	2,595,000	7,056,000	6,126,000
North America [Member] | Buffalo [Member]
Revenues	2,538,000	1,942,000	6,895,000	5,722,000
North America [Member] | North Carolina[Member]
Revenues	906,000	715,000	2,622,000	2,249,000
Europe [Member]
Revenues	1,860,000	1,517,000	4,757,000	4,396,000
Europe [Member] | Lancaster [Member]
Revenues	1,497,000	1,367,000	4,207,000	4,201,000
Europe [Member] | Buffalo [Member]
Revenues	0	0	0	0
Europe [Member] | North Carolina[Member]
Revenues	363,000	150,000	550,000	195,000
Asia [Member]
Revenues	1,761,000	1,784,000	4,612,000	4,471,000
Asia [Member] | Lancaster [Member]
Revenues	1,656,000	1,692,000	4,132,000	3,905,000
Asia [Member] | Buffalo [Member]
Revenues	0	0	0	0
Asia [Member] | North Carolina[Member]
Revenues	105,000	92,000	480,000	566,000
South America [Member]
Revenues	0	0	3,000	15,000
South America [Member] | Lancaster [Member]
Revenues	0	0	3,000	15,000
South America [Member] | Buffalo [Member]
Revenues	0	0	0	0
South America [Member] | North Carolina[Member]
Revenues	$ 0	$ 0	$ 0	$ 0