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Schedule of Remaining Performance Obligations Expected to be Recognized (Details)	Jun. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining performance obligations related to engineering only paid contracts	$ 2,038,000
Remaining performance obligations related to partial equipment paid contracts	5,949,000
Total remaining performance obligations	7,987,000
2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining performance obligations related to engineering only paid contracts	762,000
Remaining performance obligations related to partial equipment paid contracts	5,943,000
Total remaining performance obligations	6,705,000
2022 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining performance obligations related to engineering only paid contracts	1,276,000
Remaining performance obligations related to partial equipment paid contracts	6,000
Total remaining performance obligations	$ 1,282,000

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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

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