Intangible Assets, Net

3 Months Ended

12 Months Ended

Mar. 31, 2021

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

4. Intangible Assets, Net

Intangible assets, net consisted of the following at March 31, 2021 and December 31, 2020:

	March 31, 2021							December 31, 2020
	Gross Carrying Amount		(unaudited) Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	Gross Carrying Amount		(unaudited) Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Patents	$	50,000	$	(29,375	)	$	20,625	$	50,000	$	(28,750	)	$	21,250
Trade names, trademarks product names, URLs		555,000		(497,521	)		57,479		555,000		(493,648	)		61,352
Internally developed software		1,990,000		(1,990,000	)		—		1,990,000		(1,990,000	)		—
Subscriber/customer relationships		2,279,000		(2,022,061	)		256,939		2,279,000		(1,980,392	)		298,608
Total intangible assets	$	4,874,000	$	(4,538,957	)	$	335,043	$	4,874,000	$	(4,492,790	)	$	381,210

Amortization expense for the three months ended March 31, 2021 was $46,167, as compared to $64,084 for the three months ended March 31, 2020. The aggregate amortization expense for each of the next five years and thereafter is estimated to be $138,500 in 2021, $149,944 in 2022, $18,000 in 2023, $17,354 in 2024, $2,500 in 2025 and $8,745 thereafter.

6. Intangible Assets, Net

Intangible assets, net consisted of the following for the periods presented:

	December 31,
	2020							2019
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Patents	$	50,000	$	(28,750	)	$	21,250	$	50,000	$	(26,250	)	$	23,750
Trade names, trademarks, product names, URLs		555,000		(493,648	)		61,352		555,000		(446,479	)		108,521
Internally developed software		1,990,000		(1,990,000	)		—		1,990,000		(1,959,655	)		30,345
Subscriber/customer relationships		2,279,000		(1,980,392	)		298,608		2,279,000		(1,813,725	)		465,275
Total intangible assets	$	4,874,000	$	(4,492,790	)	$	381,210	$	4,874,000	$	(4,246,109	)	$	627,891

Amortization expense for the years ended December 31, 2020 and 2019 was $246,681 and $256,332, respectively. The aggregate amortization expense for each of the next five years and thereafter is estimated to be $184,667 in 2021, $149,944 in 2022, $18,000 in 2023, $17,354 in 2024, $2,500 in 2025 and $8,745 thereafter.