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Note 17 - Subsequent Event	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	17. Subsequent Event On October 7, 2020, the Company acquired Enbala Power Networks Inc. (Enbala), one of the leading providers of distributed energy optimization and control software needed to ensure the operational stability of the world’s power grids. Enbala was founded in 2003 and is headquartered in Denver, Colorado.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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