Revenue Recognition - Schedule of Unamortized Installation Cost and Sales Commissions (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($)
Balance at January 1, 2020	$ 274
Incremental costs deferred	121
Deferred costs recognized	(156)
Balance at March 31, 2020	239
Installation Cost [Member]
Balance at January 1, 2020	187
Incremental costs deferred	68
Deferred costs recognized	(92)
Balance at March 31, 2020	163
Sales Commissions [Member]
Balance at January 1, 2020	87
Incremental costs deferred	53
Deferred costs recognized	(64)
Balance at March 31, 2020	$ 76

Amount of deferred cost, excluding capitalized cost related to contract with customer; classified as noncurrent.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(10))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Name:	us-gaap_DeferredCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant