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Note 11 - Segment and Geographic Data (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]

Net Sales:

 Three months ended June 30, 2021  Three months ended June 30, 2020  Six months ended June 30, 2021  Six months ended June 30, 2020 
                 

Dental

 $2,404,738  $165,674  $5,258,395  $1,969,260 

Medical

  21,000   2,000   92,050   9,800 

Total net sales

 $2,425,738  $167,674  $5,350,445  $1,979,060 

Operating Income (Loss):

 Three months ended June 30, 2021  Three months ended June 30, 2020  Six months ended June 30, 2021  Six months ended June 30, 2020 
                 

Dental

 $524,798  $(650,236) $1,650,831  $(223,856)

Medical

  (1,135,001)  (814,429)  (2,030,720)  (1,484,241)

Corporate

  (2,262,369)  (1,708,225)  (3,477,056)  (3,073,399)

Total operating loss

 $(2,872,572) $(3,172,890) $(3,856,945) $(4,781,496)

Depreciation and Amortization

 Three months ended June 30, 2021  Three months ended June 30, 2020  Six months ended June 30, 2021  Six months ended June 30, 2020 
                 

Dental

 $860  $3,101  $2,566  $8,800 

Medical

  1,165   621   5,016   4,333 

Corporate

  12,809   17,416   28,178   45,224 

Total depreciation and amortization

 $14,834  $21,138  $35,760  $54,457 

Income (loss) before taxes and equity in earnings of affiliates:

 Three months ended June 30, 2021  Three months ended June 30, 2020  Six months ended June 30, 2021  Six months ended June 30, 2020 
                 

Dental

 $598,166  $(651,384) $1,723,284  $(225,845)

Medical

  (1,136,271)  (815,391)  (2,033,260)  (1,486,310)

Corporate

  (2,062,748)  (1,710,177)  (3,277,785)  (3,077,500)

Total loss before taxes and equity in earnings of affiliate

 $(2,600,853) $(3,176,952) $(3,587,761) $(4,789,655)

Total Assets:

 

June 30, 2021

  

December 31, 2020

 
         

Dental

 $6,639,102  $6,035,645 

Medical

  1,196,977   923,658 

Corporate

  13,223,587   12,612,147 

Total assets

 $21,059,666  $19,571,450 
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
  

Three Months Ended June 30, 2021

  

Three Months Ended June 30, 2020

 
  

Dental

  

Medical

  

Grand Total

  

Dental

  

Medical

  

Grand Total

 

Domestic: US

                        

Instruments

 $178,752  $-  $178,752  $-  $-  $- 

Handpieces

  802,916   -   802,916   36,812   2,000   38,812 

Accessories

  18,974      18,974   1,542      1,542 

Total Domestic US

 $1,000,642  $-  $1,000,642  $38,354  $2,000  $40,354 
                         

International: Rest of World

  Dental   Medical   Grand Total   Dental   Medical   Grand Total 

Instruments

  156,588  $15,500  $172,088  $31,800  $-  $31,800 

Handpieces

  709,624   5,500   715,124   87,632   -   87,632 

Accessories

  12,548   -   12,548   7,888   -   7,888 

Total International

 $878,761  $21,000  $899,761  $127,320  $-  $127,320 
                         

International: China

  Dental   Medical   Grand Total   Dental   Medical   Grand Total 

Instruments

 $78,000  $-  $78,000  $-  $-  $- 

Handpieces

  447,336   -   447,336   -   -   - 

Other

     -   -      -   - 

Total International

  525,336   -   525,336   -   -   - 
                         

Total Product Sales

 $2,404,738  $21,000  $2,425,738  $165,674  $2,000  $167,674 
  

Six Months Ended June 30, 2021

  

Six Months Ended June 30, 2020

 
  

Dental

  

Medical

  

Total

  

Dental

  

Medical

  

Total

 

Domestic: US

                        

Instruments

 $354,768  $-  $354,768  $525  $-  $525 

Handpieces

  1,597,900   8,150   1,606,050   633,490   2,000   635,490 

Accessories

  36,882      36,882   21,590      21,590 

Total Domestic US

 $1,989,550  $8,150  $1,997,700  $655,605  $2,000  $657,605 
                         

International: Rest of World

  Dental   Medical   Total   Dental   Medical   Total 

Instruments

 $539,841  $58,000  $597,841  $274,304  $7,600  $281,904 

Handpieces

  1,663,559   25,900   1,689,459   1,017,923   200   1,018,123 

Accessories

  33,109   -   33,109   21,428   -   21,428 

Total International

 $2,236,509  $83,900  $2,320,409  $1,313,655  $7,800  $1,321,455 
                         

International: China

  Dental   Medical   Total   Dental   Medical   Total 

Instruments

 $228,000  $-  $228,000  $-  $-  $- 

Handpieces

  804,336   -   804,336   -   -   - 

Other

     -   -   -      - 

Total International

  1,032,336   -  $1,032,336  $-  $-  $- 
                         

Total Product Sales

 $5,258,395  $92,050  $5,350,445  $1,969,260  $9,800  $1,979,060