Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Apr. 14, 2023	Jun. 30, 2022
Document Information Line Items
Entity Registrant Name	BLONDER TONGUE LABORATORIES, INC.
Trading Symbol	NONE
Document Type	10-K/A
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		13,368,538
Entity Public Float			$ 1,440,913
Amendment Flag	true
Amendment Description	Blonder Tongue Laboratories, Inc. (the “Company,” “we,” “us,” “our” and other similar terms) is filing this Amendment No. 1 (this “Amendment”) to its Annual Report on Form 10-K for the year ended December 31, 2022, as filed with the Securities and Exchange Commission on April 17, 2023 (the “Original Form 10-K”), for the purpose of (i) including Part III of Form 10-K.Pursuant to the rules of the SEC, Part IV, Item 15 has also been amended to contain the currently dated certifications from the Company’s principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. The certifications of the Company’s principal executive officer and principal financial officer are attached to this Amendment as Exhibits 31.3 and 31.4. As no financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 4 and 5 of the certifications have been omitted. Additionally, we are not including the certificate required under Section 906 of the Sarbanes-Oxley Act of 2002 as no financial statements are being filed with this Amendment.Accordingly, this Amendment consists only of the facing page, this explanatory note, Items 10-14 of Part III of Form 10-K, Item 15 of Part IV of Form 10-K, the signature pages to Form 10-K and the submitted exhibits. The Original Form 10-K is otherwise unchanged and has been omitted. This Amendment should be read in conjunction with the Original Form 10-K. Further, this Amendment does not reflect any subsequent events occurring after the original filing date of the Original Form 10-K and does not modify or update in any way the disclosures made in the Original Form 10-K except as described above.
Entity Central Index Key	0001000683
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Dec. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	false
Document Annual Report	true
Document Transition Report	false
Entity File Number	1-14120
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	52-1611421
Entity Address, Address Line One	One Jake Brown Road
Entity Address, City or Town	Old Bridge
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08857
City Area Code	(732)
Local Phone Number	679-4000
Title of 12(b) Security	NONE
Security Exchange Name	NONE
Entity Interactive Data Current	Yes
Auditor Name	Marcum llp
Auditor Location	New York, New York
Auditor Firm ID	688