Note 2 - Acquisitions - Pro Forma Financial Information (Details) - USD ($)  | 
3 Months Ended | |
|---|---|---|
Sep. 30, 2016  | 
Sep. 30, 2015  | 
|
| Net sales | $ 131,798 | $ 117,690 | 
| Net income | $ 23,103 | $ 21,840 | 
| X | ||||||||||
- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
| X | ||||||||||
- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |