| Document and Entity Information | Nov. 04, 2019 |
| Document and Entity Information | |
| Document Type | 8-K |
| Document Period End Date | Nov. 4, 2019 |
| Entity File Number | 001-37799 |
| Entity Registrant Name | TACTILE SYSTEMS TECHNOLOGY, INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 41-1801204 |
| Entity Address, Address Line One | 3701 Wayzata Blvd, Suite 300 |
| Entity Address, City or Town | Minneapolis |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55416 |
| City Area Code | 612 |
| Local Phone Number | 355-5100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, Par Value $0.001 Per Share |
| Trading Symbol | TCMD |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001027838 |
| Amendment Flag | false |
