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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2016
Summary of Significant Accounting Policies [Abstract]  
Schedule of sales to significant customers
  Three-Month Periods Ended September 30,  Nine-Month Periods Ended September 30, 
  2016   2015  2016  2015 
Patterson Companies, Inc.(1)  40%  39%  39%  41%
AmerisourceBergen Corporation(2)  18%  22%  20%  21%
ANIMART LLC(3)  11%  *   *     *  
Schedule of accounts receivable due from significant customers

 

  As of September 30, 2016 As of December 31, 2015 
Patterson Companies, Inc.(1)  42%  26%
ANIMART LLC(3)  15%  11%
AmerisourceBergen Corporation(2)  14%  27%

 

(1) During June 2015, Patterson Companies, Inc. (NASDAQ: PDCO) acquired Animal Health International, Inc.

(2) During March 2015, AmerisourceBergen Corporation (NYSE: ABC) acquired MWI Animal Health.

(3) Assumes that the acquisition of Animal Medic by ANIMART LLC (which closed during the third quarter of 2016) had occurred as of the beginning of the periods being reported.

 

*Amount is less than 10%.
Schedule of weighted average and diluted number of shares outstanding
  Three-Month Periods Ended September 30,  Nine-Month Periods Ended September 30, 
  2016  2015   2016  2015 
Weighted average number of shares outstanding  4,182,529   3,052,175   4,065,243   3,038,111 
Effect of dilutive stock options  119,751   136,174   113,938   124,509 
Diluted number of shares outstanding  4,302,280   3,188,349   4,179,181   3,162,620 
Outstanding stock options not included in the calculation because the effect would be anti-dilutive  20,000   0   22,000   3,000