|
Document and Entity Information Document
|
9 Months Ended | |
|---|---|---|
|
Sep. 30, 2014
|
Nov. 05, 2014
|
|
| Document and Entity Information [Abstract] | ||
| Entity Registrant Name | SPIRE Corp | |
| Entity Central Index Key | 0000731657 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Smaller Reporting Company | |
| Document Type | 10-Q | |
| Document Period End Date | Sep. 30, 2014 | |
| Document Fiscal Year Focus | 2014 | |
| Document Fiscal Period Focus | Q3 | |
| Amendment Flag | false | |
| Entity Common Stock, Shares Outstanding | 9,207,874 |