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Revenue Recognition (Details 1)	3 Months Ended
	Mar. 31, 2022 USD ($)
Revenue Recognition
Deferred Revenue, Beginning	$ 842,000
Reclassification Of Beginning Deferred Revenue To Revenue, As A Result Of Performance Obligations Satisfied	478,000
Cash Received In Advance And Not Recognized As Revenue	33,000
Deferred Revenue, Ending	$ 397,000

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- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(5))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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