| Cover | Feb. 23, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 23, 2022 |
| Entity File Number | 001-34816 |
| Entity Registrant Name | Technical Communications Corporation |
| Entity Central Index Key | 0000096699 |
| Entity Tax Identification Number | 04-2295040 |
| Entity Incorporation, State or Country Code | MA |
| Entity Address, Address Line One | 100 Domino Drive |
| Entity Address, City or Town | Concord |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 01742 |
| City Area Code | (978) |
| Local Phone Number | 287-5100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
