Quarterly report pursuant to Section 13 or 15(d)

3. Goodwill and Purchased Intangible Assets (Details)

v3.20.2
3. Goodwill and Purchased Intangible Assets (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]          
Goodwill $ 496,352   $ 496,352   $ 496,352
Amortization expense $ 37,767 $ 37,760 $ 75,444 $ 75,529  
Minimum [Member]          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful lives     1 year    
Maximum [Member]          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful lives     20 years