Revenue Recognition (Details Textual)	3 Months Ended
Mar. 31, 2020
Revenue Recognition (Textual)
Installation service performance obligations, description	The aggregate amount of the transaction price allocated to installation service performance obligations that are partially unsatisfied as of March 31, 2020 and 2019 were $0.

Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130554-203045

Name:	us-gaap_RevenuePerformanceObligationDescriptionOfPaymentTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration