Subsequent Events	3 Months Ended
Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	(16) Subsequent Events On April 29, 2022, the Company entered an Asset Purchase Agreement to acquire certain assets and liabilities of Adaptive Spectrum and Signal Alignment, Incorporated (“ASSIA”) a software quality-of-experience innovator. These assets include the CloudCheck® Wi-Fi experience management and Expresse® access network optimization software platforms and the acquisition will expand DZS’ footprint into approximately 50 service providers including many Tier I marquee operators in North America, Europe and Asia. The transaction closed in the second quarter of 2022.

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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