Notes payable (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Total debt	$ 9,035,908	$ 7,884,753
Unamortized debt issue costs	14,587	72,931
Total debt, net of debt issue costs	9,021,321	7,811,822
Unsecured note - Pardus acquisition [Member]
Total debt	$ 378,000	0
Intertest rate	1.00%
Due year	2021
SBA Payroll Protection Plan note [Member]
Total debt	$ 160,700	0
Intertest rate	1.00%
Due year	2023
Term Loan [Member]
Total debt	$ 315,273	0
Intertest rate	6.00%
Due year	2024
Equipment note [Member]
Total debt	$ 57,935	0
Intertest rate	0.00%
Due year	2025
Senior Unsecured Promissory Notes [Member]
Intertest rate	6.00%
Due year	2020
Total debt	$ 0	102,500
Senior Revolver Loan Agreement [Member]
Total debt	$ 8,124,000	$ 7,782,253
Intertest rate	4.75%
Due year	2022