Quarterly Results (Unaudited) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Apr. 30, 2022	Jan. 31, 2022	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2022	Apr. 30, 2021
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 19,378,362	$ 18,944,798	$ 18,940,211	$ 19,430,995	$ 19,051,076	$ 16,624,837	$ 16,971,045	$ 15,165,562	$ 76,694,366	$ 67,812,520
Cost of revenue (exclusive of depreciation and amortization)	8,601,093	9,275,419	8,789,201	8,593,568	8,721,479	7,559,951	7,324,780	5,847,523	35,259,281	29,453,733
Operating loss	(1,738,684)	(3,335,644)	(2,657,536)	(1,238,459)	(2,295,735)	(2,784,825)	(2,797,247)	(366,341)	(8,970,323)	(8,244,148)
Loss before income taxes	(2,089,758)	(3,502,387)	(2,846,358)	(719,878)	(2,332,432)	(2,804,806)	(4,333,995)	(945,096)	(9,158,381)	(10,416,329)
Net loss	$ (2,128,638)	$ (3,733,997)	$ (2,852,258)	$ (870,888)	$ (2,319,986)	$ (2,815,266)	$ (4,370,525)	$ (943,196)	$ (9,585,781)	$ (10,448,973)
Net loss per share allocable to common stockholders - basic (in dollars per share)	$ (0.09)	$ (0.15)	$ (0.11)	$ (0.03)	$ (0.09)	$ (0.11)	$ (0.19)	$ (0.04)	$ (0.38)	$ (0.44)
Net loss per share allocable to common stockholders - diluted (in dollars per share)	$ (0.09)	$ (0.15)	$ (0.11)	$ (0.03)	$ (0.09)	$ (0.11)	$ (0.19)	$ (0.04)	$ (0.38)	$ (0.44)