Intangible Assets - Estimated Amortization Expense (Details)	Jun. 30, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
2019 (3 months)	$ 32,000
2020	93,000
2021	45,000
2022	45,000
2023	36,000
Thereafter	148,000
Total	399,000
Acquired Customer Base [Member]
Finite-Lived Intangible Assets [Line Items]
2019 (3 months)	20,000
2020	48,000
2021	0
2022	0
2023	0
Thereafter	0
Total	68,000
Know How [Member]
Finite-Lived Intangible Assets [Line Items]
2019 (3 months)	9,000
2020	34,000
2021	34,000
2022	34,000
2023	25,000
Thereafter	0
Total	136,000
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
2019 (3 months)	3,000
2020	11,000
2021	11,000
2022	11,000
2023	11,000
Thereafter	148,000
Total	$ 195,000