Acquisition of PERC - Components of identifiable intangible assets assumed at the acquisition date (Details) - PERC Water Corporation - USD ($)		1 Months Ended
	Oct. 24, 2019	Oct. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 3,990,000
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 130,000
Useful life	3 years	3 years
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 1,300,000
Useful life	15 years
Customer backlogs
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 360,000
Useful life	2 years
Facility management contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 2,200,000
Useful life	6 years