Accounting policies - Disaggregated revenue (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total Revenue	$ 21,067,127	$ 16,701,524	$ 40,625,032	$ 33,804,841
Minimum [Member]
Contracts in progress
Number of days after consumption billings are collected			30 days
Maximum [Member]
Contracts in progress
Number of days after consumption billings are collected			45 days
Retail revenue [Member]
Total Revenue	6,526,803	5,674,790	$ 12,840,003	11,386,095
Bulk revenue [Member]
Total Revenue	8,423,749	6,711,971	15,774,393	12,957,941
Services revenue [Member]
Total Revenue	5,055,483	3,763,239	9,799,303	7,304,085
Manufacturing revenue [Member]
Total Revenue	$ 1,061,092	$ 551,524	$ 2,211,333	$ 2,156,720