Intangible Assets - Useful Life (Details) - USD ($)	3 Months Ended
	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 1,964,000	$ 1,986,000
Accumulated Amortization	1,299,000	1,231,000
Net	665,000	755,000	$ 959,000
Acquired Customer Base [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	703,000	719,000
Accumulated Amortization	635,000	601,000
Net	$ 68,000	$ 118,000
Acquired Customer Base [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life (years)	5 years	5 years
Acquired Customer Base [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life (years)	15 years	15 years
Know How [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life (years)	15 years	15 years
Gross Amount	$ 512,000	$ 512,000
Accumulated Amortization	376,000	350,000
Net	136,000	162,000
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	266,000	272,000
Accumulated Amortization	0	0
Net	$ 266,000	$ 272,000
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life (years)	20 years	20 years
Gross Amount	$ 223,000	$ 223,000
Accumulated Amortization	28,000	20,000
Net	$ 195,000	$ 203,000
Biomedical Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life (years)	5 years	5 years
Gross Amount	$ 260,000	$ 260,000
Accumulated Amortization	260,000	260,000
Net	$ 0	$ 0