Document And Entity Information	6 Months Ended
	Sep. 30, 2011	Nov. 10, 2011
Document and Entity Information [Abstract]
Entity Registrant Name	TEL INSTRUMENT ELECTRONICS CORP
Document Type	10-Q
Current Fiscal Year End Date	--03-31
Entity Common Stock, Shares Outstanding		2,652,315
Amendment Flag	true
Amendment Description	In connection with the preparation of the Company’s financial statements for the period ended March 31, 2012, the Company re-evaluated certain accounting policies and procedures relating to taxes and determined that it had not properly accounted for a change in the New Jersey tax law N.J.S.A. 54:10A. Such change lowered the Company’s New Jersey tax rate, resulting in lowering the carrying value of the New Jersey net deferred tax assets and increasing the tax provision by $256,644. The restatement did not cause the Company to lose any future benefit, and the result is such that the Company will have lower New Jersey tax expenses in the future. It was determined that the New Jersey tax law change was effective for the Company’s first quarter of fiscal year 2012 ended June 30, 2011. These accounting corrections had no impact on the Company’s income before tax and solely affect the Company’s net income (loss), basic income (loss) per share and diluted income (loss) per share for the six months ended September 30, 2011. There was no effect on the quarter ended September 30, 2011. The adjustment is a non-cash item and does not affect the Company’s operating activities or cash flows from operations. No other changes have been made. For more current information regarding the Company, readers should refer to the more recent reports filed by the Company with the Securities and Exchange Commission.
Entity Central Index Key	0000096885
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2